2120210119981 has 2 divisors, whose sum is σ = 2120210119982. Its totient is φ = 2120210119980.

The previous prime is 2120210119969. The next prime is 2120210120059. The reversal of 2120210119981 is 1899110120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1987902604900 + 132307515081 = 1409930^2 + 363741^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120210119981 - 2¹⁵ = 2120210087213 is a prime.

It is a super-2 number, since 2×2120210119981² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2120210119981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120210117981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060105059990 + 1060105059991.

It is an arithmetic number, because the mean of its divisors is an integer number (1060105059991).

Almost surely, 2^{2120210119981} is an apocalyptic number.

It is an amenable number.

2120210119981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120210119981 is an equidigital number, since it uses as much as digits as its factorization.

2120210119981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 2120210119981 in words is "two trillion, one hundred twenty billion, two hundred ten million, one hundred nineteen thousand, nine hundred eighty-one".