1121111220997 has 2 divisors, whose sum is σ = 1121111220998. Its totient is φ = 1121111220996.

The previous prime is 1121111220979. The next prime is 1121111221057. The reversal of 1121111220997 is 7990221111211.

Together with previous prime (1121111220979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1023468095556 + 97643125441 = 1011666^2 + 312479^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121111220997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121111220907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560555610498 + 560555610499.

It is an arithmetic number, because the mean of its divisors is an integer number (560555610499).

Almost surely, 2^{1121111220997} is an apocalyptic number.

It is an amenable number.

1121111220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121111220997 is an equidigital number, since it uses as much as digits as its factorization.

1121111220997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 37.

The spelling of 1121111220997 in words is "one trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, nine hundred ninety-seven".