102011020021021 has 2 divisors, whose sum is σ = 102011020021022. Its totient is φ = 102011020021020.

The previous prime is 102011020021007. The next prime is 102011020021039. The reversal of 102011020021021 is 120120020110201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101493756996921 + 517263024100 = 10074411^2 + 719210^2 .

It is a cyclic number.

It is not a de Polignac number, because 102011020021021 - 2⁷ = 102011020020893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102011020020992 and 102011020021010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102011020721021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51005510010510 + 51005510010511.

It is an arithmetic number, because the mean of its divisors is an integer number (51005510010511).

Almost surely, 2^{102011020021021} is an apocalyptic number.

It is an amenable number.

102011020021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102011020021021 is an equidigital number, since it uses as much as digits as its factorization.

102011020021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102011020021021 its reverse (120120020110201), we get a palindrome (222131040131222).

The spelling of 102011020021021 in words is "one hundred two trillion, eleven billion, twenty million, twenty-one thousand, twenty-one".