123011321971061 has 2 divisors, whose sum is σ = 123011321971062. Its totient is φ = 123011321971060.

The previous prime is 123011321971019. The next prime is 123011321971063. The reversal of 123011321971061 is 160179123110321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122818924816900 + 192397154161 = 11082370^2 + 438631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123011321971061 is a prime.

It is a super-2 number, since 2×123011321971061² (a number of 29 digits) contains 22 as substring.

Together with 123011321971063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123011321971063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61505660985530 + 61505660985531.

It is an arithmetic number, because the mean of its divisors is an integer number (61505660985531).

Almost surely, 2^{123011321971061} is an apocalyptic number.

It is an amenable number.

123011321971061 is a deficient number, since it is larger than the sum of its proper divisors (1).

123011321971061 is an equidigital number, since it uses as much as digits as its factorization.

123011321971061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The spelling of 123011321971061 in words is "one hundred twenty-three trillion, eleven billion, three hundred twenty-one million, nine hundred seventy-one thousand, sixty-one".