21237102 has 12 divisors (see below), whose sum is σ = 46013760. Its totient is φ = 7079028.

The previous prime is 21237071. The next prime is 21237113. The reversal of 21237102 is 20173212.

21237102 is nontrivially palindromic in base 5.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1179839 = 21237102 / (2 + 1 + 2 + 3 + 7 + 1 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589902 + ... + 589937.

It is an arithmetic number, because the mean of its divisors is an integer number (3834480).

Almost surely, 2^21237102 is an apocalyptic number.

21237102 is an abundant number, since it is smaller than the sum of its proper divisors (24776658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21237102 is a wasteful number, since it uses less digits than its factorization.

21237102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179847 (or 1179844 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 21237102 is about 4608.3730317760. The cubic root of 21237102 is about 276.9268618785.

The spelling of 21237102 in words is "twenty-one million, two hundred thirty-seven thousand, one hundred two".