1202011091 has 2 divisors, whose sum is σ = 1202011092. Its totient is φ = 1202011090.

The previous prime is 1202011051. The next prime is 1202011147. The reversal of 1202011091 is 1901102021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1202011091 - 2²⁶ = 1134902227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202011051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601005545 + 601005546.

It is an arithmetic number, because the mean of its divisors is an integer number (601005546).

Almost surely, 2^1202011091 is an apocalyptic number.

1202011091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202011091 is an equidigital number, since it uses as much as digits as its factorization.

1202011091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 1202011091 is about 34670.0315979089. The cubic root of 1202011091 is about 1063.2518776080.

The spelling of 1202011091 in words is "one billion, two hundred two million, eleven thousand, ninety-one".