770021002021 has 16 divisors (see below), whose sum is σ = 838444129600. Its totient is φ = 704671135488.

The previous prime is 770021001961. The next prime is 770021002033. The reversal of 770021002021 is 120200120077.

It is not a de Polignac number, because 770021002021 - 2⁹ = 770021001509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 770021001983 and 770021002001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770021003021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3842340 + ... + 4037773.

It is an arithmetic number, because the mean of its divisors is an integer number (52402758100).

Almost surely, 2^770021002021 is an apocalyptic number.

It is an amenable number.

770021002021 is a deficient number, since it is larger than the sum of its proper divisors (68423127579).

770021002021 is a wasteful number, since it uses less digits than its factorization.

770021002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880308.

The product of its (nonzero) digits is 392, while the sum is 22.

Adding to 770021002021 its reverse (120200120077), we get a palindrome (890221122098).

The spelling of 770021002021 in words is "seven hundred seventy billion, twenty-one million, two thousand, twenty-one".