21213180964066 has 32 divisors (see below), whose sum is σ = 40073558329728. Its totient is φ = 8196864197760.

The previous prime is 21213180964051. The next prime is 21213180964093. The reversal of 21213180964066 is 66046908131212.

It is a super-2 number, since 2×21213180964066² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1355293795 + ... + 1355309446.

It is an arithmetic number, because the mean of its divisors is an integer number (1252298697804).

Almost surely, 2^{21213180964066} is an apocalyptic number.

21213180964066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21213180964066 is a deficient number, since it is larger than the sum of its proper divisors (18860377365662).

21213180964066 is a wasteful number, since it uses less digits than its factorization.

21213180964066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710603306.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 21213180964066 in words is "twenty-one trillion, two hundred thirteen billion, one hundred eighty million, nine hundred sixty-four thousand, sixty-six".