21122120022 has 32 divisors (see below), whose sum is σ = 42565098240. Its totient is φ = 6987271200.

The previous prime is 21122120011. The next prime is 21122120027. The reversal of 21122120022 is 22002122112.

It is a super-2 number, since 2×21122120022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122119983 and 21122120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122120027) 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, 3944647 + ... + 3949997.

It is an arithmetic number, because the mean of its divisors is an integer number (1330159320).

Almost surely, 2^21122120022 is an apocalyptic number.

21122120022 is an abundant number, since it is smaller than the sum of its proper divisors (21442978218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122120022 is a wasteful number, since it uses less digits than its factorization.

21122120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10228.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21122120022 its reverse (22002122112), we get a palindrome (43124242134).

The spelling of 21122120022 in words is "twenty-one billion, one hundred twenty-two million, one hundred twenty thousand, twenty-two".