1111221006997 has 2 divisors, whose sum is σ = 1111221006998. Its totient is φ = 1111221006996.

The previous prime is 1111221006977. The next prime is 1111221007007. The reversal of 1111221006997 is 7996001221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 903243052881 + 207977954116 = 950391^2 + 456046^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111221006997 - 2¹⁵ = 1111220974229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111221006937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555610503498 + 555610503499.

It is an arithmetic number, because the mean of its divisors is an integer number (555610503499).

Almost surely, 2^{1111221006997} is an apocalyptic number.

It is an amenable number.

1111221006997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111221006997 is an equidigital number, since it uses as much as digits as its factorization.

1111221006997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 40.

The spelling of 1111221006997 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, six thousand, nine hundred ninety-seven".