1111222101091 has 2 divisors, whose sum is σ = 1111222101092. Its totient is φ = 1111222101090.

The previous prime is 1111222101089. The next prime is 1111222101097. The reversal of 1111222101091 is 1901012221111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111222101091 - 2¹ = 1111222101089 is a prime.

Together with 1111222101089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1111222101097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555611050545 + 555611050546.

It is an arithmetic number, because the mean of its divisors is an integer number (555611050546).

Almost surely, 2^{1111222101091} is an apocalyptic number.

1111222101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111222101091 is an equidigital number, since it uses as much as digits as its factorization.

1111222101091 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 22.

The spelling of 1111222101091 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, one hundred one thousand, ninety-one".