102312211 has 4 divisors (see below), whose sum is σ = 106760592. Its totient is φ = 97863832.

The previous prime is 102312209. The next prime is 102312227. The reversal of 102312211 is 112213201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102312211 - 2¹ = 102312209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102312191 and 102312200.

It is not an unprimeable number, because it can be changed into a prime (102312251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224156 + ... + 2224201.

It is an arithmetic number, because the mean of its divisors is an integer number (26690148).

Almost surely, 2^102312211 is an apocalyptic number.

102312211 is a deficient number, since it is larger than the sum of its proper divisors (4448381).

102312211 is an equidigital number, since it uses as much as digits as its factorization.

102312211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448380.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102312211 is about 10114.9498762970. The cubic root of 102312211 is about 467.7091037470.

Adding to 102312211 its reverse (112213201), we get a palindrome (214525412).

The spelling of 102312211 in words is "one hundred two million, three hundred twelve thousand, two hundred eleven".