101111220021 has 32 divisors (see below), whose sum is σ = 162241136640. Its totient is φ = 54717418944.

The previous prime is 101111220013. The next prime is 101111220031. The reversal of 101111220021 is 120022111101.

It is not a de Polignac number, because 101111220021 - 2³ = 101111220013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101111219979 and 101111220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111220031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1114651 + ... + 1201943.

It is an arithmetic number, because the mean of its divisors is an integer number (5070035520).

Almost surely, 2^101111220021 is an apocalyptic number.

It is an amenable number.

101111220021 is a deficient number, since it is larger than the sum of its proper divisors (61129916619).

101111220021 is a wasteful number, since it uses less digits than its factorization.

101111220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90225.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101111220021 its reverse (120022111101), we get a palindrome (221133331122).

The spelling of 101111220021 in words is "one hundred one billion, one hundred eleven million, two hundred twenty thousand, twenty-one".