102211211 has 4 divisors (see below), whose sum is σ = 102232872. Its totient is φ = 102189552.

The previous prime is 102211199. The next prime is 102211217. The reversal of 102211211 is 112112201.

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 102211211 - 2⁶ = 102211147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102211192 and 102211201.

It is not an unprimeable number, because it can be changed into a prime (102211217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410 + ... + 14303.

It is an arithmetic number, because the mean of its divisors is an integer number (25558218).

Almost surely, 2^102211211 is an apocalyptic number.

102211211 is a deficient number, since it is larger than the sum of its proper divisors (21661).

102211211 is an equidigital number, since it uses as much as digits as its factorization.

102211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21660.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 102211211 is about 10109.9560335345. The cubic root of 102211211 is about 467.5551495845. Note that the first 3 decimals are identical.

Adding to 102211211 its reverse (112112201), we get a palindrome (214323412).

The spelling of 102211211 in words is "one hundred two million, two hundred eleven thousand, two hundred eleven".