1212210205 has 24 divisors (see below), whose sum is σ = 1538307936. Its totient is φ = 916503840.

The previous prime is 1212210173. The next prime is 1212210247. The reversal of 1212210205 is 5020122121.

It is a happy number.

It is not a de Polignac number, because 1212210205 - 2⁵ = 1212210173 is a prime.

It is a super-2 number, since 2×1212210205² = 2938907162212284050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203682 + ... + 209548.

It is an arithmetic number, because the mean of its divisors is an integer number (64096164).

Almost surely, 2^1212210205 is an apocalyptic number.

It is an amenable number.

1212210205 is a deficient number, since it is larger than the sum of its proper divisors (326097731).

1212210205 is an equidigital number, since it uses as much as digits as its factorization.

1212210205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977 (or 5946 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1212210205 is about 34816.8092306001. The cubic root of 1212210205 is about 1066.2506573811.

Adding to 1212210205 its reverse (5020122121), we get a palindrome (6232332326).

The spelling of 1212210205 in words is "one billion, two hundred twelve million, two hundred ten thousand, two hundred five".