102212501112221 has 2 divisors, whose sum is σ = 102212501112222. Its totient is φ = 102212501112220.

The previous prime is 102212501112217. The next prime is 102212501112233. The reversal of 102212501112221 is 122211105212201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83133164472121 + 19079336640100 = 9117739^2 + 4367990^2 .

It is a cyclic number.

It is not a de Polignac number, because 102212501112221 - 2² = 102212501112217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102212504112221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51106250556110 + 51106250556111.

It is an arithmetic number, because the mean of its divisors is an integer number (51106250556111).

Almost surely, 2^{102212501112221} is an apocalyptic number.

It is an amenable number.

102212501112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

102212501112221 is an equidigital number, since it uses as much as digits as its factorization.

102212501112221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 23.

Adding to 102212501112221 its reverse (122211105212201), we get a palindrome (224423606324422).

The spelling of 102212501112221 in words is "one hundred two trillion, two hundred twelve billion, five hundred one million, one hundred twelve thousand, two hundred twenty-one".