22020121012212 has 36 divisors (see below), whose sum is σ = 55695975134436. Its totient is φ = 7335556481280.

The previous prime is 22020121012207. The next prime is 22020121012213. The reversal of 22020121012212 is 21221012102022.

It is a happy number.

22020121012212 is a `hidden beast` number, since 220 + 20 + 1 + 210 + 1 + 2 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3157394932836 + 18862726079376 = 1776906^2 + 4343124^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020121012213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186767589 + ... + 186885452.

It is an arithmetic number, because the mean of its divisors is an integer number (1547110420401).

Almost surely, 2^{22020121012212} is an apocalyptic number.

It is an amenable number.

22020121012212 is an abundant number, since it is smaller than the sum of its proper divisors (33675854122224).

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

22020121012212 is a wasteful number, since it uses less digits than its factorization.

22020121012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373654688 (or 373654683 counting only the distinct ones).

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

Adding to 22020121012212 its reverse (21221012102022), we get a palindrome (43241133114234).

The spelling of 22020121012212 in words is "twenty-two trillion, twenty billion, one hundred twenty-one million, twelve thousand, two hundred twelve".