111021002220021 has 16 divisors (see below), whose sum is σ = 164984771102400. Its totient is φ = 65993908439808.

The previous prime is 111021002220017. The next prime is 111021002220031. The reversal of 111021002220021 is 120022200120111.

It is not a de Polignac number, because 111021002220021 - 2² = 111021002220017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021002220001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57286377886 + ... + 57286379823.

It is an arithmetic number, because the mean of its divisors is an integer number (10311548193900).

Almost surely, 2^{111021002220021} is an apocalyptic number.

It is an amenable number.

111021002220021 is a deficient number, since it is larger than the sum of its proper divisors (53963768882379).

111021002220021 is a wasteful number, since it uses less digits than its factorization.

111021002220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114572757748.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111021002220021 its reverse (120022200120111), we get a palindrome (231043202340132).

The spelling of 111021002220021 in words is "one hundred eleven trillion, twenty-one billion, two million, two hundred twenty thousand, twenty-one".