770100028021 has 2 divisors, whose sum is σ = 770100028022. Its totient is φ = 770100028020.

The previous prime is 770100028007. The next prime is 770100028051. The reversal of 770100028021 is 120820001077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679355092900 + 90744935121 = 824230^2 + 301239^2 .

It is a cyclic number.

It is not a de Polignac number, because 770100028021 - 2⁵ = 770100027989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (770100028001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385050014010 + 385050014011.

It is an arithmetic number, because the mean of its divisors is an integer number (385050014011).

Almost surely, 2^770100028021 is an apocalyptic number.

It is an amenable number.

770100028021 is a deficient number, since it is larger than the sum of its proper divisors (1).

770100028021 is an equidigital number, since it uses as much as digits as its factorization.

770100028021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 28.

Adding to 770100028021 its reverse (120820001077), we get a palindrome (890920029098).

The spelling of 770100028021 in words is "seven hundred seventy billion, one hundred million, twenty-eight thousand, twenty-one".