22111201021 has 24 divisors (see below), whose sum is σ = 27827184960. Its totient is φ = 17198004096.

The previous prime is 22111201009. The next prime is 22111201031. The reversal of 22111201021 is 12010211122.

It is not a de Polignac number, because 22111201021 - 2⁵ = 22111200989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111200992 and 22111201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111201031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88600 + ... + 228193.

It is an arithmetic number, because the mean of its divisors is an integer number (1159466040).

Almost surely, 2^22111201021 is an apocalyptic number.

It is an amenable number.

22111201021 is a deficient number, since it is larger than the sum of its proper divisors (5715983939).

22111201021 is a wasteful number, since it uses less digits than its factorization.

22111201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316885 (or 316872 counting only the distinct ones).

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

Adding to 22111201021 its reverse (12010211122), we get a palindrome (34121412143).

The spelling of 22111201021 in words is "twenty-two billion, one hundred eleven million, two hundred one thousand, twenty-one".