123021121973 has 2 divisors, whose sum is σ = 123021121974. Its totient is φ = 123021121972.

The previous prime is 123021121961. The next prime is 123021121981. The reversal of 123021121973 is 379121120321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118958079409 + 4063042564 = 344903^2 + 63742^2 .

It is a cyclic number.

It is not a de Polignac number, because 123021121973 - 2⁴ = 123021121957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123021121903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61510560986 + 61510560987.

It is an arithmetic number, because the mean of its divisors is an integer number (61510560987).

Almost surely, 2^123021121973 is an apocalyptic number.

It is an amenable number.

123021121973 is a deficient number, since it is larger than the sum of its proper divisors (1).

123021121973 is an equidigital number, since it uses as much as digits as its factorization.

123021121973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The spelling of 123021121973 in words is "one hundred twenty-three billion, twenty-one million, one hundred twenty-one thousand, nine hundred seventy-three".