21612640541301 has 12 divisors (see below), whose sum is σ = 31218389732140. Its totient is φ = 14408366486400.

The previous prime is 21612640541287. The next prime is 21612640541389. The reversal of 21612640541301 is 10314504621612.

21612640541301 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 2 + 640 + 5 + 4 + 1 + 3 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5882104343025 + 15730536198276 = 2425305^2 + 3966174^2 .

It is not a de Polignac number, because 21612640541301 - 2⁵ = 21612640541269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21612640549301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2728150 + ... + 7118151.

Almost surely, 2^{21612640541301} is an apocalyptic number.

It is an amenable number.

21612640541301 is a deficient number, since it is larger than the sum of its proper divisors (9605749190839).

21612640541301 is a wasteful number, since it uses less digits than its factorization.

21612640541301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10090196 (or 10090193 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 21612640541301 in words is "twenty-one trillion, six hundred twelve billion, six hundred forty million, five hundred forty-one thousand, three hundred one".