102210211993 has 2 divisors, whose sum is σ = 102210211994. Its totient is φ = 102210211992.

The previous prime is 102210211991. The next prime is 102210212023. The reversal of 102210211993 is 399112012201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102178040409 + 32171584 = 319653^2 + 5672^2 .

It is a cyclic number.

It is not a de Polignac number, because 102210211993 - 2¹ = 102210211991 is a prime.

Together with 102210211991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (102210211991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51105105996 + 51105105997.

It is an arithmetic number, because the mean of its divisors is an integer number (51105105997).

Almost surely, 2^102210211993 is an apocalyptic number.

It is an amenable number.

102210211993 is a deficient number, since it is larger than the sum of its proper divisors (1).

102210211993 is an equidigital number, since it uses as much as digits as its factorization.

102210211993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 102210211993 in words is "one hundred two billion, two hundred ten million, two hundred eleven thousand, nine hundred ninety-three".