1212232220 has 12 divisors (see below), whose sum is σ = 2545687704. Its totient is φ = 484892880.

The previous prime is 1212232207. The next prime is 1212232253. The reversal of 1212232220 is 222322121.

It is a super-2 number, since 2×1212232220² = 2939013910412256800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30305786 + ... + 30305825.

It is an arithmetic number, because the mean of its divisors is an integer number (212140642).

Almost surely, 2^1212232220 is an apocalyptic number.

1212232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212232220 is an abundant number, since it is smaller than the sum of its proper divisors (1333455484).

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

1212232220 is a wasteful number, since it uses less digits than its factorization.

1212232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60611620 (or 60611618 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1212232220 is about 34817.1253839257. The cubic root of 1212232220 is about 1066.2571120828.

Adding to 1212232220 its reverse (222322121), we get a palindrome (1434554341).

The spelling of 1212232220 in words is "one billion, two hundred twelve million, two hundred thirty-two thousand, two hundred twenty".