21331010107 has 4 divisors (see below), whose sum is σ = 23270192856. Its totient is φ = 19391827360.

The previous prime is 21331010093. The next prime is 21331010111. The reversal of 21331010107 is 70101013312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21331010107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331010167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 969591358 + ... + 969591379.

It is an arithmetic number, because the mean of its divisors is an integer number (5817548214).

Almost surely, 2^21331010107 is an apocalyptic number.

21331010107 is a deficient number, since it is larger than the sum of its proper divisors (1939182749).

21331010107 is a wasteful number, since it uses less digits than its factorization.

21331010107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939182748.

The product of its (nonzero) digits is 126, while the sum is 19.

Adding to 21331010107 its reverse (70101013312), we get a palindrome (91432023419).

The spelling of 21331010107 in words is "twenty-one billion, three hundred thirty-one million, ten thousand, one hundred seven".