211364644123 has 4 divisors (see below), whose sum is σ = 211755337168. Its totient is φ = 210973951080.

The previous prime is 211364644097. The next prime is 211364644133. The reversal of 211364644123 is 321446463112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211364644123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211364644133) 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, 195345711 + ... + 195346792.

It is an arithmetic number, because the mean of its divisors is an integer number (52938834292).

Almost surely, 2^211364644123 is an apocalyptic number.

211364644123 is a deficient number, since it is larger than the sum of its proper divisors (390693045).

211364644123 is an equidigital number, since it uses as much as digits as its factorization.

211364644123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390693044.

The product of its digits is 82944, while the sum is 37.

The spelling of 211364644123 in words is "two hundred eleven billion, three hundred sixty-four million, six hundred forty-four thousand, one hundred twenty-three".