1231212032123 has 2 divisors, whose sum is σ = 1231212032124. Its totient is φ = 1231212032122.

The previous prime is 1231212032107. The next prime is 1231212032159. The reversal of 1231212032123 is 3212302121321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231212032123 - 2⁴ = 1231212032107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231212038123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615606016061 + 615606016062.

It is an arithmetic number, because the mean of its divisors is an integer number (615606016062).

Almost surely, 2^{1231212032123} is an apocalyptic number.

1231212032123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231212032123 is an equidigital number, since it uses as much as digits as its factorization.

1231212032123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1231212032123 its reverse (3212302121321), we get a palindrome (4443514153444).

The spelling of 1231212032123 in words is "one trillion, two hundred thirty-one billion, two hundred twelve million, thirty-two thousand, one hundred twenty-three".