1212122210 has 32 divisors (see below), whose sum is σ = 2372941872. Its totient is φ = 443116800.

The previous prime is 1212122207. The next prime is 1212122213. The reversal of 1212122210 is 122212121.

It is an interprime number because it is at equal distance from previous prime (1212122207) and next prime (1212122213).

It can be written as a sum of positive squares in 8 ways, for example, as 886788841 + 325333369 = 29779^2 + 18037^2 .

It is not an unprimeable number, because it can be changed into a prime (1212122213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33029 + ... + 59288.

Almost surely, 2^1212122210 is an apocalyptic number.

1212122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212122210 is a deficient number, since it is larger than the sum of its proper divisors (1160819662).

1212122210 is a wasteful number, since it uses less digits than its factorization.

1212122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92438.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1212122210 is about 34815.5455220796. The cubic root of 1212122210 is about 1066.2248568511.

Adding to 1212122210 its reverse (122212121), we get a palindrome (1334334331).

The spelling of 1212122210 in words is "one billion, two hundred twelve million, one hundred twenty-two thousand, two hundred ten".