1201123231279 has 2 divisors, whose sum is σ = 1201123231280. Its totient is φ = 1201123231278.

The previous prime is 1201123231193. The next prime is 1201123231283. The reversal of 1201123231279 is 9721323211021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201123231279 - 2¹⁵ = 1201123198511 is a prime.

It is a super-2 number, since 2×1201123231279² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201123231289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600561615639 + 600561615640.

It is an arithmetic number, because the mean of its divisors is an integer number (600561615640).

Almost surely, 2^{1201123231279} is an apocalyptic number.

1201123231279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201123231279 is an equidigital number, since it uses as much as digits as its factorization.

1201123231279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 1201123231279 in words is "one trillion, two hundred one billion, one hundred twenty-three million, two hundred thirty-one thousand, two hundred seventy-nine".