1220405520012 has 48 divisors (see below), whose sum is σ = 3293624554752. Its totient is φ = 344486237760.

The previous prime is 1220405519989. The next prime is 1220405520053. The reversal of 1220405520012 is 2100255040221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87514939 + ... + 87528882.

It is an arithmetic number, because the mean of its divisors is an integer number (68617178224).

Almost surely, 2^{1220405520012} is an apocalyptic number.

1220405520012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220405520012 is an abundant number, since it is smaller than the sum of its proper divisors (2073219034740).

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

1220405520012 is a wasteful number, since it uses less digits than its factorization.

1220405520012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175043918 (or 175043916 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The spelling of 1220405520012 in words is "one trillion, two hundred twenty billion, four hundred five million, five hundred twenty thousand, twelve".