2120393381 has 2 divisors, whose sum is σ = 2120393382. Its totient is φ = 2120393380.

The previous prime is 2120393333. The next prime is 2120393383. The reversal of 2120393381 is 1833930212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1851925156 + 268468225 = 43034^2 + 16385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120393381 is a prime.

It is a super-2 number, since 2×2120393381² = 8992136180377222322, which contains 22 as substring.

Together with 2120393383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120393383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060196690 + 1060196691.

It is an arithmetic number, because the mean of its divisors is an integer number (1060196691).

Almost surely, 2^2120393381 is an apocalyptic number.

It is an amenable number.

2120393381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120393381 is an equidigital number, since it uses as much as digits as its factorization.

2120393381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 2120393381 is about 46047.7293794167. The cubic root of 2120393381 is about 1284.7111102962.

The spelling of 2120393381 in words is "two billion, one hundred twenty million, three hundred ninety-three thousand, three hundred eighty-one".