211013331123 has 16 divisors (see below), whose sum is σ = 321551043840. Its totient is φ = 120576451296.

The previous prime is 211013331103. The next prime is 211013331161. The reversal of 211013331123 is 321133310112.

It is a happy number.

It is not a de Polignac number, because 211013331123 - 2²⁵ = 210979776691 is a prime.

It is a super-2 number, since 2×211013331123² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 211013331123.

It is not an unprimeable number, because it can be changed into a prime (211013331103) 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, 1345036 + ... + 1493702.

It is an arithmetic number, because the mean of its divisors is an integer number (20096940240).

Almost surely, 2^211013331123 is an apocalyptic number.

211013331123 is a deficient number, since it is larger than the sum of its proper divisors (110537712717).

211013331123 is a wasteful number, since it uses less digits than its factorization.

211013331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216266.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 211013331123 its reverse (321133310112), we get a palindrome (532146641235).

The spelling of 211013331123 in words is "two hundred eleven billion, thirteen million, three hundred thirty-one thousand, one hundred twenty-three".