102000120011221 has 2 divisors, whose sum is σ = 102000120011222. Its totient is φ = 102000120011220.

The previous prime is 102000120011201. The next prime is 102000120011243. The reversal of 102000120011221 is 122110021000201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98443821796996 + 3556298214225 = 9921886^2 + 1885815^2 .

It is a cyclic number.

It is not a de Polignac number, because 102000120011221 - 2⁹ = 102000120010709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102000120011201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000060005610 + 51000060005611.

It is an arithmetic number, because the mean of its divisors is an integer number (51000060005611).

Almost surely, 2^{102000120011221} is an apocalyptic number.

It is an amenable number.

102000120011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102000120011221 is an equidigital number, since it uses as much as digits as its factorization.

102000120011221 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 102000120011221 its reverse (122110021000201), we get a palindrome (224110141011422).

The spelling of 102000120011221 in words is "one hundred two trillion, one hundred twenty million, eleven thousand, two hundred twenty-one".