111122002021 has 4 divisors (see below), whose sum is σ = 111152609344. Its totient is φ = 111091394700.

The previous prime is 111122001997. The next prime is 111122002027. The reversal of 111122002021 is 120200221111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120200221111 = 47 ⋅2557451513.

It is a cyclic number.

It is not a de Polignac number, because 111122002021 - 2²⁹ = 110585131109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111122001992 and 111122002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122002027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15298215 + ... + 15305476.

It is an arithmetic number, because the mean of its divisors is an integer number (27788152336).

Almost surely, 2^111122002021 is an apocalyptic number.

It is an amenable number.

111122002021 is a deficient number, since it is larger than the sum of its proper divisors (30607323).

111122002021 is an equidigital number, since it uses as much as digits as its factorization.

111122002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30607322.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111122002021 its reverse (120200221111), we get a palindrome (231322223132).

The spelling of 111122002021 in words is "one hundred eleven billion, one hundred twenty-two million, two thousand, twenty-one".