21163132021106 has 8 divisors (see below), whose sum is σ = 31746202511724. Its totient is φ = 10581064517200.

The previous prime is 21163132021063. The next prime is 21163132021123. The reversal of 21163132021106 is 60112023136112.

It can be written as a sum of positive squares in 2 ways, for example, as 20697995745025 + 465136276081 = 4549505^2 + 682009^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250693925 + ... + 250778328.

Almost surely, 2^{21163132021106} is an apocalyptic number.

21163132021106 is a deficient number, since it is larger than the sum of its proper divisors (10583070490618).

21163132021106 is a wasteful number, since it uses less digits than its factorization.

21163132021106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501493356.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 21163132021106 its reverse (60112023136112), we get a palindrome (81275155157218).

The spelling of 21163132021106 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred thirty-two million, twenty-one thousand, one hundred six".