1020202109977 has 2 divisors, whose sum is σ = 1020202109978. Its totient is φ = 1020202109976.

The previous prime is 1020202109881. The next prime is 1020202110001. The reversal of 1020202109977 is 7799012020201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 510618859776 + 509583250201 = 714576^2 + 713851^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020202109977 - 2²³ = 1020193721369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020202109077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510101054988 + 510101054989.

It is an arithmetic number, because the mean of its divisors is an integer number (510101054989).

Almost surely, 2^{1020202109977} is an apocalyptic number.

It is an amenable number.

1020202109977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020202109977 is an equidigital number, since it uses as much as digits as its factorization.

1020202109977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 40.

The spelling of 1020202109977 in words is "one trillion, twenty billion, two hundred two million, one hundred nine thousand, nine hundred seventy-seven".