1212222210 has 16 divisors (see below), whose sum is σ = 2909333376. Its totient is φ = 323259248.

The previous prime is 1212222203. The next prime is 1212222217. The reversal of 1212222210 is 122222121.

It is an interprime number because it is at equal distance from previous prime (1212222203) and next prime (1212222217).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1212222210.

It is not an unprimeable number, because it can be changed into a prime (1212222217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20203674 + ... + 20203733.

It is an arithmetic number, because the mean of its divisors is an integer number (181833336).

Almost surely, 2^1212222210 is an apocalyptic number.

1212222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212222210 is an abundant number, since it is smaller than the sum of its proper divisors (1697111166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212222210 is a wasteful number, since it uses less digits than its factorization.

1212222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40407417.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1212222210 is about 34816.9816325310. The cubic root of 1212222210 is about 1066.2541772043.

Adding to 1212222210 its reverse (122222121), we get a palindrome (1334444331).

The spelling of 1212222210 in words is "one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred ten".