1202211091 has 2 divisors, whose sum is σ = 1202211092. Its totient is φ = 1202211090.

The previous prime is 1202211053. The next prime is 1202211133. The reversal of 1202211091 is 1901122021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202211091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202211001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601105545 + 601105546.

It is an arithmetic number, because the mean of its divisors is an integer number (601105546).

Almost surely, 2^1202211091 is an apocalyptic number.

1202211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202211091 is an equidigital number, since it uses as much as digits as its factorization.

1202211091 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1202211091 is about 34672.9158133550. The cubic root of 1202211091 is about 1063.3108450568.

The spelling of 1202211091 in words is "one billion, two hundred two million, two hundred eleven thousand, ninety-one".