1200123299957 has 2 divisors, whose sum is σ = 1200123299958. Its totient is φ = 1200123299956.

The previous prime is 1200123299923. The next prime is 1200123300031. The reversal of 1200123299957 is 7599923210021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948907826161 + 251215473796 = 974119^2 + 501214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200123299957 - 2⁴⁰ = 100611672181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200123295957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600061649978 + 600061649979.

It is an arithmetic number, because the mean of its divisors is an integer number (600061649979).

Almost surely, 2^{1200123299957} is an apocalyptic number.

It is an amenable number.

1200123299957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200123299957 is an equidigital number, since it uses as much as digits as its factorization.

1200123299957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 1200123299957 in words is "one trillion, two hundred billion, one hundred twenty-three million, two hundred ninety-nine thousand, nine hundred fifty-seven".