102020333021 has 2 divisors, whose sum is σ = 102020333022. Its totient is φ = 102020333020.

The previous prime is 102020333017. The next prime is 102020333027. The reversal of 102020333021 is 120333020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101885448025 + 134884996 = 319195^2 + 11614^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020333021 - 2² = 102020333017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020333027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010166510 + 51010166511.

It is an arithmetic number, because the mean of its divisors is an integer number (51010166511).

Almost surely, 2^102020333021 is an apocalyptic number.

It is an amenable number.

102020333021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020333021 is an equidigital number, since it uses as much as digits as its factorization.

102020333021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 102020333021 its reverse (120333020201), we get a palindrome (222353353222).

The spelling of 102020333021 in words is "one hundred two billion, twenty million, three hundred thirty-three thousand, twenty-one".