21056102 has 16 divisors (see below), whose sum is σ = 32422032. Its totient is φ = 10252320.

The previous prime is 21056089. The next prime is 21056129. The reversal of 21056102 is 20165012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12248 + ... + 13860.

It is an arithmetic number, because the mean of its divisors is an integer number (2026377).

Almost surely, 2^21056102 is an apocalyptic number.

21056102 is a deficient number, since it is larger than the sum of its proper divisors (11365930).

21056102 is a wasteful number, since it uses less digits than its factorization.

21056102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21056102 is about 4588.6928421937. The cubic root of 21056102 is about 276.1378835659.

The spelling of 21056102 in words is "twenty-one million, fifty-six thousand, one hundred two".