2120021019997 has 2 divisors, whose sum is σ = 2120021019998. Its totient is φ = 2120021019996.

The previous prime is 2120021019989. The next prime is 2120021020001. The reversal of 2120021019997 is 7999101200212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2103164152441 + 16856867556 = 1450229^2 + 129834^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120021019997 - 2³ = 2120021019989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120021019197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060010509998 + 1060010509999.

It is an arithmetic number, because the mean of its divisors is an integer number (1060010509999).

Almost surely, 2^{2120021019997} is an apocalyptic number.

It is an amenable number.

2120021019997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120021019997 is an equidigital number, since it uses as much as digits as its factorization.

2120021019997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 2120021019997 in words is "two trillion, one hundred twenty billion, twenty-one million, nineteen thousand, nine hundred ninety-seven".