21442120200 has 96 divisors (see below), whose sum is σ = 73856210400. Its totient is φ = 5717897280.

The previous prime is 21442120169. The next prime is 21442120303. The reversal of 21442120200 is 202124412.

21442120200 is a `hidden beast` number, since 2 + 1 + 442 + 1 + 20 + 200 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 1979982 + ... + 1990781.

It is an arithmetic number, because the mean of its divisors is an integer number (769335525).

Almost surely, 2^21442120200 is an apocalyptic number.

21442120200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21442120200 is an abundant number, since it is smaller than the sum of its proper divisors (52414090200).

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

21442120200 is a wasteful number, since it uses less digits than its factorization.

21442120200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970788 (or 3970773 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21442120200 its reverse (202124412), we get a palindrome (21644244612).

The spelling of 21442120200 in words is "twenty-one billion, four hundred forty-two million, one hundred twenty thousand, two hundred".