123120130981 has 2 divisors, whose sum is σ = 123120130982. Its totient is φ = 123120130980.

The previous prime is 123120130961. The next prime is 123120130993. The reversal of 123120130981 is 189031021321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98135586756 + 24984544225 = 313266^2 + 158065^2 .

It is a cyclic number.

It is not a de Polignac number, because 123120130981 - 2¹³ = 123120122789 is a prime.

It is a super-2 number, since 2×123120130981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123120130961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61560065490 + 61560065491.

It is an arithmetic number, because the mean of its divisors is an integer number (61560065491).

Almost surely, 2^123120130981 is an apocalyptic number.

It is an amenable number.

123120130981 is a deficient number, since it is larger than the sum of its proper divisors (1).

123120130981 is an equidigital number, since it uses as much as digits as its factorization.

123120130981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 123120130981 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred thirty thousand, nine hundred eighty-one".