21122112022 has 16 divisors (see below), whose sum is σ = 34905672144. Its totient is φ = 9505900000.

The previous prime is 21122112017. The next prime is 21122112023. The reversal of 21122112022 is 22021122112.

It is a happy number.

It is a super-2 number, since 2×21122112022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122111987 and 21122112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122112023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4750729 + ... + 4755172.

It is an arithmetic number, because the mean of its divisors is an integer number (2181604509).

Almost surely, 2^21122112022 is an apocalyptic number.

21122112022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122112022 is a deficient number, since it is larger than the sum of its proper divisors (13783560122).

21122112022 is a wasteful number, since it uses less digits than its factorization.

21122112022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9506015.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21122112022 its reverse (22021122112), we get a palindrome (43143234134).

The spelling of 21122112022 in words is "twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, twenty-two".