769021121021 has 2 divisors, whose sum is σ = 769021121022. Its totient is φ = 769021121020.

The previous prime is 769021120949. The next prime is 769021121041. The reversal of 769021121021 is 120121120967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 768929056996 + 92064025 = 876886^2 + 9595^2 .

It is an emirp because it is prime and its reverse (120121120967) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-769021121021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769021121041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384510560510 + 384510560511.

It is an arithmetic number, because the mean of its divisors is an integer number (384510560511).

Almost surely, 2^769021121021 is an apocalyptic number.

It is an amenable number.

769021121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

769021121021 is an equidigital number, since it uses as much as digits as its factorization.

769021121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

Adding to 769021121021 its reverse (120121120967), we get a palindrome (889142241988).

The spelling of 769021121021 in words is "seven hundred sixty-nine billion, twenty-one million, one hundred twenty-one thousand, twenty-one".