213109213685 has 16 divisors (see below), whose sum is σ = 258086606400. Its totient is φ = 168918086400.

The previous prime is 213109213679. The next prime is 213109213697. The reversal of 213109213685 is 586312901312.

It is not a de Polignac number, because 213109213685 - 2¹⁶ = 213109148149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1544666 + ... + 1676964.

It is an arithmetic number, because the mean of its divisors is an integer number (16130412900).

Almost surely, 2^213109213685 is an apocalyptic number.

It is an amenable number.

213109213685 is a deficient number, since it is larger than the sum of its proper divisors (44977392715).

213109213685 is a wasteful number, since it uses less digits than its factorization.

213109213685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135268.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 213109213685 in words is "two hundred thirteen billion, one hundred nine million, two hundred thirteen thousand, six hundred eighty-five".