123135621143 has 2 divisors, whose sum is σ = 123135621144. Its totient is φ = 123135621142.

The previous prime is 123135621131. The next prime is 123135621179. The reversal of 123135621143 is 341126531321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123135621143 - 2¹⁰ = 123135620119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123135621043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61567810571 + 61567810572.

It is an arithmetic number, because the mean of its divisors is an integer number (61567810572).

Almost surely, 2^123135621143 is an apocalyptic number.

123135621143 is a deficient number, since it is larger than the sum of its proper divisors (1).

123135621143 is an equidigital number, since it uses as much as digits as its factorization.

123135621143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The spelling of 123135621143 in words is "one hundred twenty-three billion, one hundred thirty-five million, six hundred twenty-one thousand, one hundred forty-three".