21163070107 has 4 divisors (see below), whose sum is σ = 21163686880. Its totient is φ = 21162453336.

The previous prime is 21163070083. The next prime is 21163070113. The reversal of 21163070107 is 70107036112.

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

It is a cyclic number.

It is not a de Polignac number, because 21163070107 - 2⁷ = 21163069979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21163070507) 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, 253683 + ... + 326620.

It is an arithmetic number, because the mean of its divisors is an integer number (5290921720).

Almost surely, 2^21163070107 is an apocalyptic number.

21163070107 is a deficient number, since it is larger than the sum of its proper divisors (616773).

21163070107 is an equidigital number, since it uses as much as digits as its factorization.

21163070107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616772.

The product of its (nonzero) digits is 1764, while the sum is 28.

The spelling of 21163070107 in words is "twenty-one billion, one hundred sixty-three million, seventy thousand, one hundred seven".