22021001121 has 32 divisors (see below), whose sum is σ = 35332761600. Its totient is φ = 11917480320.

The previous prime is 22021001099. The next prime is 22021001173. The reversal of 22021001121 is 12110012022.

It is not a de Polignac number, because 22021001121 - 2¹⁵ = 22020968353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021001097 and 22021001106.

It is not an unprimeable number, because it can be changed into a prime (22021001921) 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, 1745725 + ... + 1758293.

It is an arithmetic number, because the mean of its divisors is an integer number (1104148800).

Almost surely, 2^22021001121 is an apocalyptic number.

22021001121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22021001121 is a deficient number, since it is larger than the sum of its proper divisors (13311760479).

22021001121 is a wasteful number, since it uses less digits than its factorization.

22021001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16989.

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

Adding to 22021001121 its reverse (12110012022), we get a palindrome (34131013143).

The spelling of 22021001121 in words is "twenty-two billion, twenty-one million, one thousand, one hundred twenty-one".