22021210212012 has 72 divisors (see below), whose sum is σ = 61292680368192. Its totient is φ = 6610728626400.

The previous prime is 22021210211981. The next prime is 22021210212019. The reversal of 22021210212012 is 21021201212022.

It is a happy number.

22021210212012 is a `hidden beast` number, since 220 + 21 + 210 + 212 + 0 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22021210212019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259813314 + ... + 259898057.

It is an arithmetic number, because the mean of its divisors is an integer number (851287227336).

Almost surely, 2^{22021210212012} is an apocalyptic number.

22021210212012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22021210212012 is an abundant number, since it is smaller than the sum of its proper divisors (39271470156180).

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

22021210212012 is a wasteful number, since it uses less digits than its factorization.

22021210212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519711499 (or 519711494 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22021210212012 its reverse (21021201212022), we get a palindrome (43042411424034).

It can be divided in two parts, 22021210 and 212012, that added together give a palindrome (22233222).

The spelling of 22021210212012 in words is "twenty-two trillion, twenty-one billion, two hundred ten million, two hundred twelve thousand, twelve".