22012121012 has 24 divisors (see below), whose sum is σ = 44027430720. Its totient is φ = 9433082880.

The previous prime is 22012120987. The next prime is 22012121017. The reversal of 22012121012 is 21012121022.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012121017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642164 + ... + 675572.

It is an arithmetic number, because the mean of its divisors is an integer number (1834476280).

Almost surely, 2^22012121012 is an apocalyptic number.

It is an amenable number.

22012121012 is an abundant number, since it is smaller than the sum of its proper divisors (22015309708).

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

22012121012 is a wasteful number, since it uses less digits than its factorization.

22012121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56951 (or 56949 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22012121012 its reverse (21012121022), we get a palindrome (43024242034).

The spelling of 22012121012 in words is "twenty-two billion, twelve million, one hundred twenty-one thousand, twelve".