2120210397 has 10 divisors (see below), whose sum is σ = 3167227998. Its totient is φ = 1413473544.

The previous prime is 2120210381. The next prime is 2120210413. The reversal of 2120210397 is 7930120212.

It is an interprime number because it is at equal distance from previous prime (2120210381) and next prime (2120210413).

It can be written as a sum of positive squares in only one way, i.e., 2107636281 + 12574116 = 45909^2 + 3546^2 .

It is not a de Polignac number, because 2120210397 - 2⁴ = 2120210381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2120210397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120210797) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13087638 + ... + 13087799.

Almost surely, 2^2120210397 is an apocalyptic number.

2120210397 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2120210397 is a deficient number, since it is larger than the sum of its proper divisors (1047017601).

2120210397 is an equidigital number, since it uses as much as digits as its factorization.

2120210397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26175449 (or 26175440 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 2120210397 is about 46045.7424416199. The cubic root of 2120210397 is about 1284.6741535782.

The spelling of 2120210397 in words is "two billion, one hundred twenty million, two hundred ten thousand, three hundred ninety-seven".