101211012156 has 48 divisors (see below), whose sum is σ = 240218697600. Its totient is φ = 33157323072.

The previous prime is 101211012137. The next prime is 101211012179. The reversal of 101211012156 is 651210112101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3478075 + ... + 3507053.

It is an arithmetic number, because the mean of its divisors is an integer number (5004556200).

Almost surely, 2^101211012156 is an apocalyptic number.

It is an amenable number.

101211012156 is an abundant number, since it is smaller than the sum of its proper divisors (139007685444).

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

101211012156 is a wasteful number, since it uses less digits than its factorization.

101211012156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33978 (or 33976 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 21.

Adding to 101211012156 its reverse (651210112101), we get a palindrome (752421124257).

The spelling of 101211012156 in words is "one hundred one billion, two hundred eleven million, twelve thousand, one hundred fifty-six".