21007052102 has 16 divisors (see below), whose sum is σ = 32540629632. Its totient is φ = 10160458560.

The previous prime is 21007052057. The next prime is 21007052113. The reversal of 21007052102 is 20125070012.

It is a super-2 number, since 2×21007052102² (a number of 21 digits) contains 22 as substring.

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, 81578 + ... + 220610.

It is an arithmetic number, because the mean of its divisors is an integer number (2033789352).

Almost surely, 2^21007052102 is an apocalyptic number.

21007052102 is a deficient number, since it is larger than the sum of its proper divisors (11533577530).

21007052102 is a wasteful number, since it uses less digits than its factorization.

21007052102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141503.

The product of its (nonzero) digits is 280, while the sum is 20.

The spelling of 21007052102 in words is "twenty-one billion, seven million, fifty-two thousand, one hundred two".