21121200102200 has 96 divisors (see below), whose sum is σ = 53573231250000. Its totient is φ = 7680122803200.

The previous prime is 21121200102181. The next prime is 21121200102241. The reversal of 21121200102200 is 220100212112.

It is a super-2 number, since 2×21121200102200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 57564926 + ... + 57930674.

Almost surely, 2^{21121200102200} is an apocalyptic number.

21121200102200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121200102200 is an abundant number, since it is smaller than the sum of its proper divisors (32452031147800).

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

21121200102200 is a wasteful number, since it uses less digits than its factorization.

21121200102200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392025 (or 392016 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21121200102200 its reverse (220100212112), we get a palindrome (21341300314312).

The spelling of 21121200102200 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred million, one hundred two thousand, two hundred".