101111211021 has 16 divisors (see below), whose sum is σ = 138523953600. Its totient is φ = 65554691328.

The previous prime is 101111211017. The next prime is 101111211031. The reversal of 101111211021 is 120112111101.

It is not a de Polignac number, because 101111211021 - 2² = 101111211017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101111210988 and 101111211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111211011) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22390 + ... + 450248.

It is an arithmetic number, because the mean of its divisors is an integer number (8657747100).

Almost surely, 2^101111211021 is an apocalyptic number.

It is an amenable number.

101111211021 is a deficient number, since it is larger than the sum of its proper divisors (37412742579).

101111211021 is a wasteful number, since it uses less digits than its factorization.

101111211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430028.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 101111211021 its reverse (120112111101), we get a palindrome (221223322122).

The spelling of 101111211021 in words is "one hundred one billion, one hundred eleven million, two hundred eleven thousand, twenty-one".