1212001012220 has 12 divisors (see below), whose sum is σ = 2545202125704. Its totient is φ = 484800404880.

The previous prime is 1212001012171. The next prime is 1212001012241. The reversal of 1212001012220 is 222101002121.

It is a junction number, because it is equal to n+sod(n) for n = 1212001012195 and 1212001012204.

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, 30300025286 + ... + 30300025325.

It is an arithmetic number, because the mean of its divisors is an integer number (212100177142).

Almost surely, 2^{1212001012220} is an apocalyptic number.

1212001012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212001012220 is an abundant number, since it is smaller than the sum of its proper divisors (1333201113484).

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

1212001012220 is a wasteful number, since it uses less digits than its factorization.

1212001012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60600050620 (or 60600050618 counting only the distinct ones).

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

Adding to 1212001012220 its reverse (222101002121), we get a palindrome (1434102014341).

The spelling of 1212001012220 in words is "one trillion, two hundred twelve billion, one million, twelve thousand, two hundred twenty".