111020021210021 has 64 divisors (see below), whose sum is σ = 143567747481600. Its totient is φ = 83304428659200.

The previous prime is 111020021209987. The next prime is 111020021210027. The reversal of 111020021210021 is 120012120020111.

It is not a de Polignac number, because 111020021210021 - 2¹⁰ = 111020021208997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111020021209978 and 111020021210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020021210027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1823287745 + ... + 1823348633.

It is an arithmetic number, because the mean of its divisors is an integer number (2243246054400).

Almost surely, 2^{111020021210021} is an apocalyptic number.

111020021210021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111020021210021 is a deficient number, since it is larger than the sum of its proper divisors (32547726271579).

111020021210021 is a wasteful number, since it uses less digits than its factorization.

111020021210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63090.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111020021210021 its reverse (120012120020111), we get a palindrome (231032141230132).

The spelling of 111020021210021 in words is "one hundred eleven trillion, twenty billion, twenty-one million, two hundred ten thousand, twenty-one".