102122001218021 has 2 divisors, whose sum is σ = 102122001218022. Its totient is φ = 102122001218020.

The previous prime is 102122001217949. The next prime is 102122001218099. The reversal of 102122001218021 is 120812100221201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98748222081796 + 3373779136225 = 9937214^2 + 1836785^2 .

It is a cyclic number.

It is not a de Polignac number, because 102122001218021 - 2¹⁰ = 102122001216997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102122001218221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51061000609010 + 51061000609011.

It is an arithmetic number, because the mean of its divisors is an integer number (51061000609011).

Almost surely, 2^{102122001218021} is an apocalyptic number.

It is an amenable number.

102122001218021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102122001218021 is an equidigital number, since it uses as much as digits as its factorization.

102122001218021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 23.

Adding to 102122001218021 its reverse (120812100221201), we get a palindrome (222934101439222).

The spelling of 102122001218021 in words is "one hundred two trillion, one hundred twenty-two billion, one million, two hundred eighteen thousand, twenty-one".