21150216266000 has 40 divisors (see below), whose sum is σ = 51141222936024. Its totient is φ = 8460086505600.

The previous prime is 21150216265999. The next prime is 21150216266063. The reversal of 21150216266000 is 66261205112.

It can be written as a sum of positive squares in 4 ways, for example, as 574339653904 + 20575876612096 = 757852^2 + 4536064^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5287552067 + ... + 5287556066.

Almost surely, 2^{21150216266000} is an apocalyptic number.

21150216266000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21150216266000 is an abundant number, since it is smaller than the sum of its proper divisors (29991006670024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21150216266000 is a wasteful number, since it uses less digits than its factorization.

21150216266000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10575108156 (or 10575108140 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 21150216266000 in words is "twenty-one trillion, one hundred fifty billion, two hundred sixteen million, two hundred sixty-six thousand".