102211999 has 2 divisors, whose sum is σ = 102212000. Its totient is φ = 102211998.

The previous prime is 102211997. The next prime is 102212009. The reversal of 102211999 is 999112201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102211999 - 2¹ = 102211997 is a prime.

Together with 102211997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102211997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51105999 + 51106000.

It is an arithmetic number, because the mean of its divisors is an integer number (51106000).

Almost surely, 2^102211999 is an apocalyptic number.

102211999 is a deficient number, since it is larger than the sum of its proper divisors (1).

102211999 is an equidigital number, since it uses as much as digits as its factorization.

102211999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 102211999 is about 10109.9950049444. The cubic root of 102211999 is about 467.5563511243.

The spelling of 102211999 in words is "one hundred two million, two hundred eleven thousand, nine hundred ninety-nine".