21000200120010 has 32 divisors (see below), whose sum is σ = 56000533654080. Its totient is φ = 5600053365264.

The previous prime is 21000200119963. The next prime is 21000200120027. The reversal of 21000200120010 is 1002100200012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21000200119974 and 21000200120001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38889259212 + ... + 38889259751.

It is an arithmetic number, because the mean of its divisors is an integer number (1750016676690).

Almost surely, 2^{21000200120010} is an apocalyptic number.

21000200120010 is an abundant number, since it is smaller than the sum of its proper divisors (35000333534070).

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

21000200120010 is a wasteful number, since it uses less digits than its factorization.

21000200120010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77778518979 (or 77778518973 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 21000200120010 its reverse (1002100200012), we get a palindrome (22002300320022).

The spelling of 21000200120010 in words is "twenty-one trillion, two hundred million, one hundred twenty thousand, ten".