102211205 has 8 divisors (see below), whose sum is σ = 125968632. Its totient is φ = 79558848.

The previous prime is 102211199. The next prime is 102211217. The reversal of 102211205 is 502112201.

It can be written as a sum of positive squares in 4 ways, for example, as 12208036 + 90003169 = 3494^2 + 9487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102211205 - 2¹⁴ = 102194821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102211205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276062 + ... + 276431.

It is an arithmetic number, because the mean of its divisors is an integer number (15746079).

Almost surely, 2^102211205 is an apocalyptic number.

It is an amenable number.

102211205 is a deficient number, since it is larger than the sum of its proper divisors (23757427).

102211205 is an equidigital number, since it uses as much as digits as its factorization.

102211205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552535.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 102211205 is about 10109.9557367973. The cubic root of 102211205 is about 467.5551404357. Note that the first 3 decimals are identical.

Adding to 102211205 its reverse (502112201), we get a palindrome (604323406).

The spelling of 102211205 in words is "one hundred two million, two hundred eleven thousand, two hundred five".