123120331031 has 2 divisors, whose sum is σ = 123120331032. Its totient is φ = 123120331030.

The previous prime is 123120330979. The next prime is 123120331057. The reversal of 123120331031 is 130133021321.

It is a strong prime.

It is an emirp because it is prime and its reverse (130133021321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123120331031 - 2⁶ = 123120330967 is a prime.

It is a super-2 number, since 2×123120331031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123120330994 and 123120331012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123120333031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61560165515 + 61560165516.

It is an arithmetic number, because the mean of its divisors is an integer number (61560165516).

Almost surely, 2^123120331031 is an apocalyptic number.

123120331031 is a deficient number, since it is larger than the sum of its proper divisors (1).

123120331031 is an equidigital number, since it uses as much as digits as its factorization.

123120331031 is an evil number, because the sum of its binary digits is even.

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

Adding to 123120331031 its reverse (130133021321), we get a palindrome (253253352352).

The spelling of 123120331031 in words is "one hundred twenty-three billion, one hundred twenty million, three hundred thirty-one thousand, thirty-one".