1200020212991 has 2 divisors, whose sum is σ = 1200020212992. Its totient is φ = 1200020212990.

The previous prime is 1200020212907. The next prime is 1200020213081. The reversal of 1200020212991 is 1992120200021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200020212991 - 2¹⁰ = 1200020211967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200020212291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600010106495 + 600010106496.

It is an arithmetic number, because the mean of its divisors is an integer number (600010106496).

Almost surely, 2^{1200020212991} is an apocalyptic number.

1200020212991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200020212991 is an equidigital number, since it uses as much as digits as its factorization.

1200020212991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 1200020212991 in words is "one trillion, two hundred billion, twenty million, two hundred twelve thousand, nine hundred ninety-one".