1200012020191 has 2 divisors, whose sum is σ = 1200012020192. Its totient is φ = 1200012020190.

The previous prime is 1200012020183. The next prime is 1200012020209. The reversal of 1200012020191 is 1910202100021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200012020191 - 2³ = 1200012020183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200012020101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600006010095 + 600006010096.

It is an arithmetic number, because the mean of its divisors is an integer number (600006010096).

Almost surely, 2^{1200012020191} is an apocalyptic number.

1200012020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200012020191 is an equidigital number, since it uses as much as digits as its factorization.

1200012020191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 1200012020191 in words is "one trillion, two hundred billion, twelve million, twenty thousand, one hundred ninety-one".