21102010107 has 16 divisors (see below), whose sum is σ = 28402836000. Its totient is φ = 13934674944.

The previous prime is 21102010091. The next prime is 21102010117. The reversal of 21102010107 is 70101020112.

It is not a de Polignac number, because 21102010107 - 2⁴ = 21102010091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102010117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1342369 + ... + 1357997.

It is an arithmetic number, because the mean of its divisors is an integer number (1775177250).

Almost surely, 2^21102010107 is an apocalyptic number.

21102010107 is a deficient number, since it is larger than the sum of its proper divisors (7300825893).

21102010107 is a wasteful number, since it uses less digits than its factorization.

21102010107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19870.

The product of its (nonzero) digits is 28, while the sum is 15.

Adding to 21102010107 its reverse (70101020112), we get a palindrome (91203030219).

The spelling of 21102010107 in words is "twenty-one billion, one hundred two million, ten thousand, one hundred seven".