213421001256366 has 16 divisors (see below), whose sum is σ = 426967066134864. Its totient is φ = 71119489815104.

The previous prime is 213421001256349. The next prime is 213421001256377. The reversal of 213421001256366 is 663652100124312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5210962071 + ... + 5211003026.

It is an arithmetic number, because the mean of its divisors is an integer number (26685441633429).

Almost surely, 2^{213421001256366} is an apocalyptic number.

213421001256366 is an abundant number, since it is smaller than the sum of its proper divisors (213546064878498).

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

213421001256366 is a wasteful number, since it uses less digits than its factorization.

213421001256366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10421968515.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 213421001256366 in words is "two hundred thirteen trillion, four hundred twenty-one billion, one million, two hundred fifty-six thousand, three hundred sixty-six".