21213610526412 has 60 divisors (see below), whose sum is σ = 56746255930056. Its totient is φ = 6906756911040.

The previous prime is 21213610526377. The next prime is 21213610526441. The reversal of 21213610526412 is 21462501631212.

21213610526412 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 3 + 6 + 1 + 0 + 5 + 2 + 641 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 761312889 + ... + 761340752.

Almost surely, 2^{21213610526412} is an apocalyptic number.

It is an amenable number.

21213610526412 is an abundant number, since it is smaller than the sum of its proper divisors (35532645403644).

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

21213610526412 is a wasteful number, since it uses less digits than its factorization.

21213610526412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522653700 (or 1522653689 counting only the distinct ones).

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

The spelling of 21213610526412 in words is "twenty-one trillion, two hundred thirteen billion, six hundred ten million, five hundred twenty-six thousand, four hundred twelve".