21971102 has 16 divisors (see below), whose sum is σ = 33969552. Its totient is φ = 10653120.

The previous prime is 21971083. The next prime is 21971107. The reversal of 21971102 is 20117912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21971107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7673 + ... + 10139.

It is an arithmetic number, because the mean of its divisors is an integer number (2123097).

Almost surely, 2^21971102 is an apocalyptic number.

21971102 is a deficient number, since it is larger than the sum of its proper divisors (11998450).

21971102 is a wasteful number, since it uses less digits than its factorization.

21971102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 21971102 is about 4687.3342104015. The cubic root of 21971102 is about 280.0811924405.

The spelling of 21971102 in words is "twenty-one million, nine hundred seventy-one thousand, one hundred two".