1210111000997 has 2 divisors, whose sum is σ = 1210111000998. Its totient is φ = 1210111000996.

The previous prime is 1210111000957. The next prime is 1210111001023. The reversal of 1210111000997 is 7990001110121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1194093820516 + 16017180481 = 1092746^2 + 126559^2 .

It is an emirp because it is prime and its reverse (7990001110121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210111000997 - 2⁶ = 1210111000933 is a prime.

It is a super-2 number, since 2×1210111000997² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210111000957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605055500498 + 605055500499.

It is an arithmetic number, because the mean of its divisors is an integer number (605055500499).

Almost surely, 2^{1210111000997} is an apocalyptic number.

It is an amenable number.

1210111000997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210111000997 is an equidigital number, since it uses as much as digits as its factorization.

1210111000997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 32.

The spelling of 1210111000997 in words is "one trillion, two hundred ten billion, one hundred eleven million, nine hundred ninety-seven", and thus it is an aban number.