21122875553800 has 48 divisors (see below), whose sum is σ = 51999549533460. Its totient is φ = 7952141383680.

The previous prime is 21122875553771. The next prime is 21122875553831. The reversal of 21122875553800 is 835557822112.

It can be written as a sum of positive squares in 6 ways, for example, as 11132459133156 + 9990416420644 = 3336534^2 + 3160762^2 .

It is a super-2 number, since 2×21122875553800² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3106301829 + ... + 3106308628.

Almost surely, 2^{21122875553800} is an apocalyptic number.

21122875553800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122875553800 is an abundant number, since it is smaller than the sum of its proper divisors (30876673979660).

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

21122875553800 is a wasteful number, since it uses less digits than its factorization.

21122875553800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6212610490 (or 6212610481 counting only the distinct ones).

The product of its (nonzero) digits is 1344000, while the sum is 49.

The spelling of 21122875553800 in words is "twenty-one trillion, one hundred twenty-two billion, eight hundred seventy-five million, five hundred fifty-three thousand, eight hundred".