1212122022220 has 48 divisors (see below), whose sum is σ = 2600438537088. Its totient is φ = 474382529280.

The previous prime is 1212122022187. The next prime is 1212122022257. The reversal of 1212122022220 is 222202212121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2787454 + ... + 3192826.

It is an arithmetic number, because the mean of its divisors is an integer number (54175802856).

Almost surely, 2^{1212122022220} is an apocalyptic number.

1212122022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212122022220 is an abundant number, since it is smaller than the sum of its proper divisors (1388316514868).

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

1212122022220 is a wasteful number, since it uses less digits than its factorization.

1212122022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408610 (or 408608 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1212122022220 its reverse (222202212121), we get a palindrome (1434324234341).

The spelling of 1212122022220 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, twenty-two thousand, two hundred twenty".