1212001212220 has 12 divisors (see below), whose sum is σ = 2545202545704. Its totient is φ = 484800484880.

The previous prime is 1212001212199. The next prime is 1212001212223. The reversal of 1212001212220 is 222121002121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1212001212194 and 1212001212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212001212223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30300030286 + ... + 30300030325.

It is an arithmetic number, because the mean of its divisors is an integer number (212100212142).

Almost surely, 2^{1212001212220} is an apocalyptic number.

1212001212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212001212220 is an abundant number, since it is smaller than the sum of its proper divisors (1333201333484).

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

1212001212220 is a wasteful number, since it uses less digits than its factorization.

1212001212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60600060620 (or 60600060618 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1212001212220 its reverse (222121002121), we get a palindrome (1434122214341).

The spelling of 1212001212220 in words is "one trillion, two hundred twelve billion, one million, two hundred twelve thousand, two hundred twenty".