22121012043200 has 84 divisors (see below), whose sum is σ = 62207446041552. Its totient is φ = 7584346982400.

The previous prime is 22121012043191. The next prime is 22121012043211. The reversal of 22121012043200 is 234021012122.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 987533981 + ... + 987556380.

It is an arithmetic number, because the mean of its divisors is an integer number (740564833828).

Almost surely, 2^{22121012043200} is an apocalyptic number.

22121012043200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121012043200 is an abundant number, since it is smaller than the sum of its proper divisors (40086433998352).

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

22121012043200 is a wasteful number, since it uses less digits than its factorization.

22121012043200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975090390 (or 1975090375 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22121012043200 its reverse (234021012122), we get a palindrome (22355033055322).

The spelling of 22121012043200 in words is "twenty-two trillion, one hundred twenty-one billion, twelve million, forty-three thousand, two hundred".