22121221211012 has 48 divisors (see below), whose sum is σ = 48304939842432. Its totient is φ = 8611433114880.

The previous prime is 22121221210889. The next prime is 22121221211113. The reversal of 22121221211012 is 21011212212122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29734043 + ... + 30468930.

It is an arithmetic number, because the mean of its divisors is an integer number (1006352913384).

Almost surely, 2^{22121221211012} is an apocalyptic number.

22121221211012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22121221211012 is an abundant number, since it is smaller than the sum of its proper divisors (26183718631420).

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

22121221211012 is a wasteful number, since it uses less digits than its factorization.

22121221211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60204188 (or 60204186 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22121221211012 its reverse (21011212212122), we get a palindrome (43132433423134).

It can be divided in two parts, 221212212110 and 12, that added together give a palindrome (221212212122).

The spelling of 22121221211012 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred eleven thousand, twelve".