111220022221291 has 2 divisors, whose sum is σ = 111220022221292. Its totient is φ = 111220022221290.

The previous prime is 111220022221109. The next prime is 111220022221313. The reversal of 111220022221291 is 192122220022111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111220022221291 is a prime.

It is not a weakly prime, because it can be changed into another prime (111220022221991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610011110645 + 55610011110646.

It is an arithmetic number, because the mean of its divisors is an integer number (55610011110646).

Almost surely, 2^{111220022221291} is an apocalyptic number.

111220022221291 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220022221291 is an equidigital number, since it uses as much as digits as its factorization.

111220022221291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 111220022221291 in words is "one hundred eleven trillion, two hundred twenty billion, twenty-two million, two hundred twenty-one thousand, two hundred ninety-one".