102222321123821 has 2 divisors, whose sum is σ = 102222321123822. Its totient is φ = 102222321123820.

The previous prime is 102222321123719. The next prime is 102222321123859. The reversal of 102222321123821 is 128321123222201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77942941960900 + 24279379162921 = 8828530^2 + 4927411^2 .

It is a cyclic number.

It is not a de Polignac number, because 102222321123821 - 2¹⁴ = 102222321107437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102222321123421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51111160561910 + 51111160561911.

It is an arithmetic number, because the mean of its divisors is an integer number (51111160561911).

Almost surely, 2^{102222321123821} is an apocalyptic number.

It is an amenable number.

102222321123821 is a deficient number, since it is larger than the sum of its proper divisors (1).

102222321123821 is an equidigital number, since it uses as much as digits as its factorization.

102222321123821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 102222321123821 in words is "one hundred two trillion, two hundred twenty-two billion, three hundred twenty-one million, one hundred twenty-three thousand, eight hundred twenty-one".