7790010211021 has 2 divisors, whose sum is σ = 7790010211022. Its totient is φ = 7790010211020.

The previous prime is 7790010211019. The next prime is 7790010211051. The reversal of 7790010211021 is 1201120100977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4770707798025 + 3019302412996 = 2184195^2 + 1737614^2 .

It is an emirp because it is prime and its reverse (1201120100977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7790010211021 - 2¹ = 7790010211019 is a prime.

It is a super-2 number, since 2×7790010211021² (a number of 27 digits) contains 22 as substring.

Together with 7790010211019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7790010211051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3895005105510 + 3895005105511.

It is an arithmetic number, because the mean of its divisors is an integer number (3895005105511).

Almost surely, 2^{7790010211021} is an apocalyptic number.

It is an amenable number.

7790010211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7790010211021 is an equidigital number, since it uses as much as digits as its factorization.

7790010211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 31.

Adding to 7790010211021 its reverse (1201120100977), we get a palindrome (8991130311998).

The spelling of 7790010211021 in words is "seven trillion, seven hundred ninety billion, ten million, two hundred eleven thousand, twenty-one".