1211353104 has 80 divisors (see below), whose sum is σ = 3378158784. Its totient is φ = 371827200.

The previous prime is 1211353061. The next prime is 1211353109. The reversal of 1211353104 is 4013531121.

It is not an unprimeable number, because it can be changed into a prime (1211353109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285559 + ... + 289769.

Almost surely, 2^1211353104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211353104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1689079392).

1211353104 is an abundant number, since it is smaller than the sum of its proper divisors (2166805680).

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

1211353104 is a wasteful number, since it uses less digits than its factorization.

1211353104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696 (or 4690 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1211353104 is about 34804.4983299573. The cubic root of 1211353104 is about 1065.9992983415. Note that the first 3 decimals are identical.

Adding to 1211353104 its reverse (4013531121), we get a palindrome (5224884225).

The spelling of 1211353104 in words is "one billion, two hundred eleven million, three hundred fifty-three thousand, one hundred four".