21213612402201 has 48 divisors (see below), whose sum is σ = 31879486129920. Its totient is φ = 13582377768960.

The previous prime is 21213612402149. The next prime is 21213612402223. The reversal of 21213612402201 is 10220421631212.

21213612402201 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 3 + 612 + 40 + 2 + 2 + 0 + 1 = 666.

It is not a de Polignac number, because 21213612402201 - 2¹¹ = 21213612400153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21213612402901) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 68944185 + ... + 69251193.

It is an arithmetic number, because the mean of its divisors is an integer number (664155961040).

Almost surely, 2^{21213612402201} is an apocalyptic number.

It is an amenable number.

21213612402201 is a deficient number, since it is larger than the sum of its proper divisors (10665873727719).

21213612402201 is a wasteful number, since it uses less digits than its factorization.

21213612402201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310046 (or 310043 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 21213612402201 in words is "twenty-one trillion, two hundred thirteen billion, six hundred twelve million, four hundred two thousand, two hundred one".