22212222121100 has 72 divisors (see below), whose sum is σ = 53367199572288. Its totient is φ = 7956616852800.

The previous prime is 22212222121093. The next prime is 22212222121123. The reversal of 22212222121100 is 112122221222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150619802 + ... + 150767201.

Almost surely, 2^{22212222121100} is an apocalyptic number.

22212222121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212222121100 is an abundant number, since it is smaller than the sum of its proper divisors (31154977451188).

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

22212222121100 is a wasteful number, since it uses less digits than its factorization.

22212222121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301387095 (or 301387088 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22212222121100 its reverse (112122221222), we get a palindrome (22324344342322).

It can be divided in two parts, 22212222 and 121100, that added together give a palindrome (22333322).

The spelling of 22212222121100 in words is "twenty-two trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred".