101219972538 has 16 divisors (see below), whose sum is σ = 207377505216. Its totient is φ = 32917064160.

The previous prime is 101219972537. The next prime is 101219972543. The reversal of 101219972538 is 835279912101.

It is a happy number.

It is a super-2 number, since 2×101219972538² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (101219972537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205731406 + ... + 205731897.

It is an arithmetic number, because the mean of its divisors is an integer number (12961094076).

Almost surely, 2^101219972538 is an apocalyptic number.

101219972538 is an abundant number, since it is smaller than the sum of its proper divisors (106157532678).

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

101219972538 is a wasteful number, since it uses less digits than its factorization.

101219972538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411463349.

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 101219972538 in words is "one hundred one billion, two hundred nineteen million, nine hundred seventy-two thousand, five hundred thirty-eight".