3111021997 has 2 divisors, whose sum is σ = 3111021998. Its totient is φ = 3111021996.

The previous prime is 3111021983. The next prime is 3111022051. The reversal of 3111021997 is 7991201113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2402078121 + 708943876 = 49011^2 + 26626^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111021997 - 2⁷ = 3111021869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3111021937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555510998 + 1555510999.

It is an arithmetic number, because the mean of its divisors is an integer number (1555510999).

Almost surely, 2^3111021997 is an apocalyptic number.

It is an amenable number.

3111021997 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111021997 is an equidigital number, since it uses as much as digits as its factorization.

3111021997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 3111021997 is about 55776.5362585380. The cubic root of 3111021997 is about 1459.8257747002.

The spelling of 3111021997 in words is "three billion, one hundred eleven million, twenty-one thousand, nine hundred ninety-seven".