123111202331 has 16 divisors (see below), whose sum is σ = 136448876256. Its totient is φ = 110356598016.

The previous prime is 123111202303. The next prime is 123111202343. The reversal of 123111202331 is 133202111321.

It is a happy number.

It is not a de Polignac number, because 123111202331 - 2²² = 123107008027 is a prime.

It is a super-2 number, since 2×123111202331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123111202351) 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, 539810 + ... + 733223.

It is an arithmetic number, because the mean of its divisors is an integer number (8528054766).

Almost surely, 2^123111202331 is an apocalyptic number.

123111202331 is a deficient number, since it is larger than the sum of its proper divisors (13337673925).

123111202331 is a wasteful number, since it uses less digits than its factorization.

123111202331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273262.

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

Adding to 123111202331 its reverse (133202111321), we get a palindrome (256313313652).

The spelling of 123111202331 in words is "one hundred twenty-three billion, one hundred eleven million, two hundred two thousand, three hundred thirty-one".