21264532166012 has 24 divisors (see below), whose sum is σ = 38431714870080. Its totient is φ = 10289125763840.

The previous prime is 21264532165967. The next prime is 21264532166057. The reversal of 21264532166012 is 21066123546212.

It is an interprime number because it is at equal distance from previous prime (21264532165967) and next prime (21264532166057).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635428289 + ... + 635461752.

It is an arithmetic number, because the mean of its divisors is an integer number (1601321452920).

Almost surely, 2^{21264532166012} is an apocalyptic number.

It is an amenable number.

21264532166012 is a deficient number, since it is larger than the sum of its proper divisors (17167182704068).

21264532166012 is a wasteful number, since it uses less digits than its factorization.

21264532166012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270890181 (or 1270890179 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 21264532166012 in words is "twenty-one trillion, two hundred sixty-four billion, five hundred thirty-two million, one hundred sixty-six thousand, twelve".