1201196017921 has 2 divisors, whose sum is σ = 1201196017922. Its totient is φ = 1201196017920.

The previous prime is 1201196017897. The next prime is 1201196017937. The reversal of 1201196017921 is 1297106911021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 870759591025 + 330436426896 = 933145^2 + 574836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201196017921 - 2⁷ = 1201196017793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201196017951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600598008960 + 600598008961.

It is an arithmetic number, because the mean of its divisors is an integer number (600598008961).

Almost surely, 2^{1201196017921} is an apocalyptic number.

It is an amenable number.

1201196017921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201196017921 is an equidigital number, since it uses as much as digits as its factorization.

1201196017921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 40.

The spelling of 1201196017921 in words is "one trillion, two hundred one billion, one hundred ninety-six million, seventeen thousand, nine hundred twenty-one".