22012201021212 has 36 divisors (see below), whose sum is σ = 55650423563280. Its totient is φ = 7336283287872.

The previous prime is 22012201021189. The next prime is 22012201021219. The reversal of 22012201021212 is 21212010221022.

It is a happy number.

22012201021212 is a `hidden beast` number, since 2 + 201 + 220 + 10 + 21 + 212 = 666.

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 (22012201021219) 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, 46304088 + ... + 46777055.

It is an arithmetic number, because the mean of its divisors is an integer number (1545845098980).

Almost surely, 2^{22012201021212} is an apocalyptic number.

It is an amenable number.

22012201021212 is an abundant number, since it is smaller than the sum of its proper divisors (33638222542068).

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

22012201021212 is a wasteful number, since it uses less digits than its factorization.

22012201021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93087722 (or 93087717 counting only the distinct ones).

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

Adding to 22012201021212 its reverse (21212010221022), we get a palindrome (43224211242234).

The spelling of 22012201021212 in words is "twenty-two trillion, twelve billion, two hundred one million, twenty-one thousand, two hundred twelve".