1211400150 has 48 divisors (see below), whose sum is σ = 3008338704. Its totient is φ = 322602880.

The previous prime is 1211400139. The next prime is 1211400173. The reversal of 1211400150 is 510041121.

It is a happy number.

It is a super-3 number, since 3×1211400150³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114484 + ... + 124616.

It is an arithmetic number, because the mean of its divisors is an integer number (62673723).

Almost surely, 2^1211400150 is an apocalyptic number.

1211400150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211400150 is an abundant number, since it is smaller than the sum of its proper divisors (1796938554).

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

1211400150 is a wasteful number, since it uses less digits than its factorization.

1211400150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10945 (or 10940 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1211400150 is about 34805.1741843077. The cubic root of 1211400150 is about 1066.0130984337.

Adding to 1211400150 its reverse (510041121), we get a palindrome (1721441271).

The spelling of 1211400150 in words is "one billion, two hundred eleven million, four hundred thousand, one hundred fifty".