211123330013 has 4 divisors (see below), whose sum is σ = 211138768800. Its totient is φ = 211107891228.

The previous prime is 211123329973. The next prime is 211123330043. The reversal of 211123330013 is 310033321112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211123330013 - 2²² = 211119135709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211123330043) 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, 7698863 + ... + 7726236.

It is an arithmetic number, because the mean of its divisors is an integer number (52784692200).

Almost surely, 2^211123330013 is an apocalyptic number.

It is an amenable number.

211123330013 is a deficient number, since it is larger than the sum of its proper divisors (15438787).

211123330013 is a wasteful number, since it uses less digits than its factorization.

211123330013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15438786.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 211123330013 its reverse (310033321112), we get a palindrome (521156651125).

The spelling of 211123330013 in words is "two hundred eleven billion, one hundred twenty-three million, three hundred thirty thousand, thirteen".