101111213021 has 48 divisors (see below), whose sum is σ = 132336589056. Its totient is φ = 75213840384.

The previous prime is 101111213011. The next prime is 101111213033. The reversal of 101111213021 is 120312111101.

It is a de Polignac number, because none of the positive numbers 2^k-101111213021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101111212987 and 101111213005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111213011) 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, 38053325 + ... + 38055981.

It is an arithmetic number, because the mean of its divisors is an integer number (2757012272).

Almost surely, 2^101111213021 is an apocalyptic number.

It is an amenable number.

101111213021 is a deficient number, since it is larger than the sum of its proper divisors (31225376035).

101111213021 is a wasteful number, since it uses less digits than its factorization.

101111213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158 (or 4141 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 101111213021 its reverse (120312111101), we get a palindrome (221423324122).

The spelling of 101111213021 in words is "one hundred one billion, one hundred eleven million, two hundred thirteen thousand, twenty-one".