21292102 has 16 divisors (see below), whose sum is σ = 35505792. Its totient is φ = 9509760.

The previous prime is 21292099. The next prime is 21292147. The reversal of 21292102 is 20129212.

It is a self number, because there is not a number n which added to its sum of digits gives 21292102.

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, 12403 + ... + 14014.

It is an arithmetic number, because the mean of its divisors is an integer number (2219112).

Almost surely, 2^21292102 is an apocalyptic number.

21292102 is a deficient number, since it is larger than the sum of its proper divisors (14213690).

21292102 is a wasteful number, since it uses less digits than its factorization.

21292102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26463.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 21292102 is about 4614.3365720329. The cubic root of 21292102 is about 277.1657181947.

It can be divided in two parts, 2129210 and 2, that added together give a palindrome (2129212).

The spelling of 21292102 in words is "twenty-one million, two hundred ninety-two thousand, one hundred two".