22013210121 has 16 divisors (see below), whose sum is σ = 35517112704. Its totient is φ = 11839037184.

The previous prime is 22013210099. The next prime is 22013210137. The reversal of 22013210121 is 12101231022.

It is not a de Polignac number, because 22013210121 - 2⁹ = 22013209609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22013210121.

It is not an unprimeable number, because it can be changed into a prime (22013212121) 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, 30830470 + ... + 30831183.

It is an arithmetic number, because the mean of its divisors is an integer number (2219819544).

Almost surely, 2^22013210121 is an apocalyptic number.

22013210121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22013210121 is a deficient number, since it is larger than the sum of its proper divisors (13503902583).

22013210121 is a wasteful number, since it uses less digits than its factorization.

22013210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61661680.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 22013210121 its reverse (12101231022), we get a palindrome (34114441143).

The spelling of 22013210121 in words is "twenty-two billion, thirteen million, two hundred ten thousand, one hundred twenty-one".