1211530350 has 96 divisors (see below), whose sum is σ = 3056768640. Its totient is φ = 317520000.

The previous prime is 1211530349. The next prime is 1211530351. The reversal of 1211530350 is 530351121.

1211530350 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1211530349) and next prime (1211530351).

It is a super-2 number, since 2×1211530350² = 2935611577942245000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211530351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3196461 + ... + 3196839.

It is an arithmetic number, because the mean of its divisors is an integer number (31841340).

Almost surely, 2^1211530350 is an apocalyptic number.

1211530350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211530350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1528384320).

1211530350 is an abundant number, since it is smaller than the sum of its proper divisors (1845238290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211530350 is a wasteful number, since it uses less digits than its factorization.

1211530350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1211530350 is about 34807.0445456089. The cubic root of 1211530350 is about 1066.0512883837.

Adding to 1211530350 its reverse (530351121), we get a palindrome (1741881471).

The spelling of 1211530350 in words is "one billion, two hundred eleven million, five hundred thirty thousand, three hundred fifty".