211233123321131 has 4 divisors (see below), whose sum is σ = 211416644715264. Its totient is φ = 211049601927000.

The previous prime is 211233123321071. The next prime is 211233123321179. The reversal of 211233123321131 is 131123321332112.

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

It is a cyclic number.

It is not a de Polignac number, because 211233123321131 - 2¹⁸ = 211233123058987 is a prime.

It is a super-2 number, since 2×211233123321131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211233123321094 and 211233123321103.

It is not an unprimeable number, because it can be changed into a prime (211233123324131) 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, 91760695340 + ... + 91760697641.

It is an arithmetic number, because the mean of its divisors is an integer number (52854161178816).

Almost surely, 2^{211233123321131} is an apocalyptic number.

211233123321131 is a deficient number, since it is larger than the sum of its proper divisors (183521394133).

211233123321131 is a wasteful number, since it uses less digits than its factorization.

211233123321131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183521394132.

The product of its digits is 3888, while the sum is 29.

Adding to 211233123321131 its reverse (131123321332112), we get a palindrome (342356444653243).

The spelling of 211233123321131 in words is "two hundred eleven trillion, two hundred thirty-three billion, one hundred twenty-three million, three hundred twenty-one thousand, one hundred thirty-one".