1202121211091 has 2 divisors, whose sum is σ = 1202121211092. Its totient is φ = 1202121211090.

The previous prime is 1202121211061. The next prime is 1202121211127. The reversal of 1202121211091 is 1901121212021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1202121211091 - 2¹⁰ = 1202121210067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202121211061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601060605545 + 601060605546.

It is an arithmetic number, because the mean of its divisors is an integer number (601060605546).

Almost surely, 2^{1202121211091} is an apocalyptic number.

1202121211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202121211091 is an equidigital number, since it uses as much as digits as its factorization.

1202121211091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 1202121211091 in words is "one trillion, two hundred two billion, one hundred twenty-one million, two hundred eleven thousand, ninety-one".