211123213013 has 16 divisors (see below), whose sum is σ = 221185278720. Its totient is φ = 201135542784.

The previous prime is 211123213001. The next prime is 211123213031. The reversal of 211123213013 is 310312321112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 211123213013 - 2⁸ = 211123212757 is a prime.

It is a super-2 number, since 2×211123213013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211123213813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12654245 + ... + 12670917.

It is an arithmetic number, because the mean of its divisors is an integer number (13824079920).

Almost surely, 2^211123213013 is an apocalyptic number.

211123213013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

211123213013 is a deficient number, since it is larger than the sum of its proper divisors (10062065707).

211123213013 is a wasteful number, since it uses less digits than its factorization.

211123213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18868.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211123213013 its reverse (310312321112), we get a palindrome (521435534125).

The spelling of 211123213013 in words is "two hundred eleven billion, one hundred twenty-three million, two hundred thirteen thousand, thirteen".