21000012122022 has 32 divisors (see below), whose sum is σ = 42012415234944. Its totient is φ = 6997939166400.

The previous prime is 21000012122009. The next prime is 21000012122039. The reversal of 21000012122022 is 22022121000012.

It is a super-3 number, since 3×21000012122022³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21000012121992 and 21000012122010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380773053 + ... + 380828199.

It is an arithmetic number, because the mean of its divisors is an integer number (1312887976092).

Almost surely, 2^{21000012122022} is an apocalyptic number.

21000012122022 is an abundant number, since it is smaller than the sum of its proper divisors (21012403112922).

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

21000012122022 is a wasteful number, since it uses less digits than its factorization.

21000012122022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72724.

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

Adding to 21000012122022 its reverse (22022121000012), we get a palindrome (43022133122034).

The spelling of 21000012122022 in words is "twenty-one trillion, twelve million, one hundred twenty-two thousand, twenty-two".