22012221010212 has 144 divisors (see below), whose sum is σ = 56344107980160. Its totient is φ = 7245457689600.

The previous prime is 22012221010211. The next prime is 22012221010259. The reversal of 22012221010212 is 21201012221022.

It is a happy number.

22012221010212 is a `hidden beast` number, since 220 + 1 + 2 + 221 + 0 + 10 + 212 = 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 (22012221010211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 869726214 + ... + 869751522.

It is an arithmetic number, because the mean of its divisors is an integer number (391278527640).

Almost surely, 2^{22012221010212} is an apocalyptic number.

It is an amenable number.

22012221010212 is an abundant number, since it is smaller than the sum of its proper divisors (34331886969948).

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

22012221010212 is a wasteful number, since it uses less digits than its factorization.

22012221010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26354 (or 26349 counting only the distinct ones).

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

Adding to 22012221010212 its reverse (21201012221022), we get a palindrome (43213233231234).

The spelling of 22012221010212 in words is "twenty-two trillion, twelve billion, two hundred twenty-one million, ten thousand, two hundred twelve".