1121111221091 has 2 divisors, whose sum is σ = 1121111221092. Its totient is φ = 1121111221090.

The previous prime is 1121111221057. The next prime is 1121111221127. The reversal of 1121111221091 is 1901221111211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121111221091 - 2³⁴ = 1103931351907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1121111221291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560555610545 + 560555610546.

It is an arithmetic number, because the mean of its divisors is an integer number (560555610546).

Almost surely, 2^{1121111221091} is an apocalyptic number.

1121111221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121111221091 is an equidigital number, since it uses as much as digits as its factorization.

1121111221091 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 23.

The spelling of 1121111221091 in words is "one trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty-one thousand, ninety-one".