123451121 has 2 divisors, whose sum is σ = 123451122. Its totient is φ = 123451120.

The previous prime is 123451117. The next prime is 123451169. The reversal of 123451121 is 121154321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 48455521 = 8660^2 + 6961^2 .

It is a cyclic number.

It is not a de Polignac number, because 123451121 - 2² = 123451117 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123451093 and 123451102.

It is not a weakly prime, because it can be changed into another prime (123451171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61725560 + 61725561.

It is an arithmetic number, because the mean of its divisors is an integer number (61725561).

Almost surely, 2^123451121 is an apocalyptic number.

It is an amenable number.

123451121 is a deficient number, since it is larger than the sum of its proper divisors (1).

123451121 is an equidigital number, since it uses as much as digits as its factorization.

123451121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 123451121 is about 11110.8559976268. The cubic root of 123451121 is about 497.9262389209.

The spelling of 123451121 in words is "one hundred twenty-three million, four hundred fifty-one thousand, one hundred twenty-one".