770100020021 has 4 divisors (see below), whose sum is σ = 784630209132. Its totient is φ = 755569830912.

The previous prime is 770100019991. The next prime is 770100020113. The reversal of 770100020021 is 120020001077.

770100020021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 409745932996 + 360354087025 = 640114^2 + 600295^2 .

It is a cyclic number.

It is not a de Polignac number, because 770100020021 - 2³⁸ = 495222113077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 770100019975 and 770100020002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770100028021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7265094476 + ... + 7265094581.

It is an arithmetic number, because the mean of its divisors is an integer number (196157552283).

Almost surely, 2^770100020021 is an apocalyptic number.

It is an amenable number.

770100020021 is a deficient number, since it is larger than the sum of its proper divisors (14530189111).

770100020021 is a wasteful number, since it uses less digits than its factorization.

770100020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14530189110.

The product of its (nonzero) digits is 196, while the sum is 20.

Adding to 770100020021 its reverse (120020001077), we get a palindrome (890120021098).

The spelling of 770100020021 in words is "seven hundred seventy billion, one hundred million, twenty thousand, twenty-one".