213021264138 has 8 divisors (see below), whose sum is σ = 426042528288. Its totient is φ = 71007088044.

The previous prime is 213021264133. The next prime is 213021264143. The reversal of 213021264138 is 831462120312.

It is an interprime number because it is at equal distance from previous prime (213021264133) and next prime (213021264143).

It is a sphenic number, since it is the product of 3 distinct primes.

213021264138 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213021264099 and 213021264108.

It is not an unprimeable number, because it can be changed into a prime (213021264133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17751772006 + ... + 17751772017.

It is an arithmetic number, because the mean of its divisors is an integer number (53255316036).

Almost surely, 2^213021264138 is an apocalyptic number.

213021264138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

213021264138 is a wasteful number, since it uses less digits than its factorization.

213021264138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35503544028.

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 213021264138 in words is "two hundred thirteen billion, twenty-one million, two hundred sixty-four thousand, one hundred thirty-eight".