111022020021 has 32 divisors (see below), whose sum is σ = 163859406336. Its totient is φ = 66303720000.

The previous prime is 111022020013. The next prime is 111022020061. The reversal of 111022020021 is 120020220111.

It is not a de Polignac number, because 111022020021 - 2³ = 111022020013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111022019979 and 111022020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111022020061) 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, 624330 + ... + 782196.

It is an arithmetic number, because the mean of its divisors is an integer number (5120606448).

Almost surely, 2^111022020021 is an apocalyptic number.

111022020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111022020021 is a deficient number, since it is larger than the sum of its proper divisors (52837386315).

111022020021 is a wasteful number, since it uses less digits than its factorization.

111022020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158193.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 111022020021 its reverse (120020220111), we get a palindrome (231042240132).

The spelling of 111022020021 in words is "one hundred eleven billion, twenty-two million, twenty thousand, twenty-one".