102400200021 has 16 divisors (see below), whose sum is σ = 156708100224. Its totient is φ = 58263262464.

The previous prime is 102400200017. The next prime is 102400200031. The reversal of 102400200021 is 120002004201.

It is not a de Polignac number, because 102400200021 - 2² = 102400200017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102400200011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10459056 + ... + 10468841.

It is an arithmetic number, because the mean of its divisors is an integer number (9794256264).

Almost surely, 2^102400200021 is an apocalyptic number.

It is an amenable number.

102400200021 is a deficient number, since it is larger than the sum of its proper divisors (54307900203).

102400200021 is a wasteful number, since it uses less digits than its factorization.

102400200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20928140.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 102400200021 its reverse (120002004201), we get a palindrome (222402204222).

The spelling of 102400200021 in words is "one hundred two billion, four hundred million, two hundred thousand, twenty-one".