102021211102021 has 2 divisors, whose sum is σ = 102021211102022. Its totient is φ = 102021211102020.

The previous prime is 102021211102001. The next prime is 102021211102043. The reversal of 102021211102021 is 120201112120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98466425150625 + 3554785951396 = 9923025^2 + 1885414^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021211102021 - 2¹⁷ = 102021210970949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102021211101986 and 102021211102004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021211102001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010605551010 + 51010605551011.

It is an arithmetic number, because the mean of its divisors is an integer number (51010605551011).

Almost surely, 2^{102021211102021} is an apocalyptic number.

It is an amenable number.

102021211102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021211102021 is an equidigital number, since it uses as much as digits as its factorization.

102021211102021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 102021211102021 its reverse (120201112120201), we get a palindrome (222222323222222).

The spelling of 102021211102021 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, one hundred two thousand, twenty-one".