2097117221 has 2 divisors, whose sum is σ = 2097117222. Its totient is φ = 2097117220.

The previous prime is 2097117179. The next prime is 2097117277. The reversal of 2097117221 is 1227117902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2088033025 + 9084196 = 45695^2 + 3014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2097117221 is a prime.

It is a super-2 number, since 2×2097117221² = 8795801277229525682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2097117721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1048558610 + 1048558611.

It is an arithmetic number, because the mean of its divisors is an integer number (1048558611).

Almost surely, 2^2097117221 is an apocalyptic number.

It is an amenable number.

2097117221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2097117221 is an equidigital number, since it uses as much as digits as its factorization.

2097117221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 2097117221 is about 45794.2924500423. The cubic root of 2097117221 is about 1279.9929241552.

The spelling of 2097117221 in words is "two billion, ninety-seven million, one hundred seventeen thousand, two hundred twenty-one".