111011200020021 has 64 divisors (see below), whose sum is σ = 181639488614400. Its totient is φ = 58860567198720.

The previous prime is 111011200020011. The next prime is 111011200020037. The reversal of 111011200020021 is 120020002110111.

It is not a de Polignac number, because 111011200020021 - 2⁵ = 111011200019989 is a prime.

It is a super-2 number, since 2×111011200020021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111011200019979 and 111011200020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011200020011) 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, 981049755 + ... + 981162903.

It is an arithmetic number, because the mean of its divisors is an integer number (2838117009600).

Almost surely, 2^{111011200020021} is an apocalyptic number.

It is an amenable number.

111011200020021 is a deficient number, since it is larger than the sum of its proper divisors (70628288594379).

111011200020021 is a wasteful number, since it uses less digits than its factorization.

111011200020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151954.

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

Adding to 111011200020021 its reverse (120020002110111), we get a palindrome (231031202130132).

The spelling of 111011200020021 in words is "one hundred eleven trillion, eleven billion, two hundred million, twenty thousand, twenty-one".