2202121997 has 2 divisors, whose sum is σ = 2202121998. Its totient is φ = 2202121996.

The previous prime is 2202121993. The next prime is 2202122009. The reversal of 2202121997 is 7991212022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1630625161 + 571496836 = 40381^2 + 23906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2202121997 - 2² = 2202121993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2202121993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101060998 + 1101060999.

It is an arithmetic number, because the mean of its divisors is an integer number (1101060999).

Almost surely, 2^2202121997 is an apocalyptic number.

It is an amenable number.

2202121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2202121997 is an equidigital number, since it uses as much as digits as its factorization.

2202121997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 2202121997 is about 46926.7727102557. The cubic root of 2202121997 is about 1301.0094717440.

The spelling of 2202121997 in words is "two billion, two hundred two million, one hundred twenty-one thousand, nine hundred ninety-seven".