1202012191 has 2 divisors, whose sum is σ = 1202012192. Its totient is φ = 1202012190.

The previous prime is 1202012173. The next prime is 1202012221. The reversal of 1202012191 is 1912102021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1202012191 - 2⁵ = 1202012159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202012101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601006095 + 601006096.

It is an arithmetic number, because the mean of its divisors is an integer number (601006096).

Almost surely, 2^1202012191 is an apocalyptic number.

1202012191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202012191 is an equidigital number, since it uses as much as digits as its factorization.

1202012191 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 square root of 1202012191 is about 34670.0474617500. The cubic root of 1202012191 is about 1063.2522019468.

The spelling of 1202012191 in words is "one billion, two hundred two million, twelve thousand, one hundred ninety-one".