121200000023 has 2 divisors, whose sum is σ = 121200000024. Its totient is φ = 121200000022.

The previous prime is 121199999981. The next prime is 121200000091. The reversal of 121200000023 is 320000002121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121200000023 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121200008023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600000011 + 60600000012.

It is an arithmetic number, because the mean of its divisors is an integer number (60600000012).

Almost surely, 2^121200000023 is an apocalyptic number.

121200000023 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200000023 is an equidigital number, since it uses as much as digits as its factorization.

121200000023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 121200000023 its reverse (320000002121), we get a palindrome (441200002144).

The spelling of 121200000023 in words is "one hundred twenty-one billion, two hundred million, twenty-three", and thus it is an aban number.