1220405312300 has 72 divisors (see below), whose sum is σ = 2734553644032. Its totient is φ = 472268808000.

The previous prime is 1220405312293. The next prime is 1220405312359. The reversal of 1220405312300 is 32135040221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10242065 + ... + 10360535.

Almost surely, 2^{1220405312300} is an apocalyptic number.

1220405312300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220405312300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367276822016).

1220405312300 is an abundant number, since it is smaller than the sum of its proper divisors (1514148331732).

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

1220405312300 is a wasteful number, since it uses less digits than its factorization.

1220405312300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121839 (or 121832 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The spelling of 1220405312300 in words is "one trillion, two hundred twenty billion, four hundred five million, three hundred twelve thousand, three hundred".