21085102 has 8 divisors (see below), whose sum is σ = 31764096. Its totient is φ = 10497072.

The previous prime is 21085091. The next prime is 21085109. The reversal of 21085102 is 20158012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21085102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21085109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22158 + ... + 23089.

It is an arithmetic number, because the mean of its divisors is an integer number (3970512).

Almost surely, 2^21085102 is an apocalyptic number.

21085102 is a deficient number, since it is larger than the sum of its proper divisors (10678994).

21085102 is a wasteful number, since it uses less digits than its factorization.

21085102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45482.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 21085102 is about 4591.8516962115. The cubic root of 21085102 is about 276.2645978240.

The spelling of 21085102 in words is "twenty-one million, eighty-five thousand, one hundred two".