102110221021021 has 2 divisors, whose sum is σ = 102110221021022. Its totient is φ = 102110221021020.

The previous prime is 102110221021001. The next prime is 102110221021093. The reversal of 102110221021021 is 120120122011201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94800016440900 + 7310204580121 = 9736530^2 + 2703739^2 .

It is a cyclic number.

It is not a de Polignac number, because 102110221021021 - 2¹⁵ = 102110220988253 is a prime.

It is a super-3 number, since 3×102110221021021³ (a number of 43 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102110221020986 and 102110221021004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102110221021001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055110510510 + 51055110510511.

It is an arithmetic number, because the mean of its divisors is an integer number (51055110510511).

Almost surely, 2^{102110221021021} is an apocalyptic number.

It is an amenable number.

102110221021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102110221021021 is an equidigital number, since it uses as much as digits as its factorization.

102110221021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102110221021021 its reverse (120120122011201), we get a palindrome (222230343032222).

The spelling of 102110221021021 in words is "one hundred two trillion, one hundred ten billion, two hundred twenty-one million, twenty-one thousand, twenty-one".