21253700102 has 8 divisors (see below), whose sum is σ = 32083611456. Its totient is φ = 10559162952.

The previous prime is 21253700023. The next prime is 21253700113. The reversal of 21253700102 is 20100735212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33843158 + ... + 33843785.

It is an arithmetic number, because the mean of its divisors is an integer number (4010451432).

Almost surely, 2^21253700102 is an apocalyptic number.

21253700102 is a deficient number, since it is larger than the sum of its proper divisors (10829911354).

21253700102 is a wasteful number, since it uses less digits than its factorization.

21253700102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67687102.

The product of its (nonzero) digits is 840, while the sum is 23.

The spelling of 21253700102 in words is "twenty-one billion, two hundred fifty-three million, seven hundred thousand, one hundred two".