1220020001220 has 24 divisors (see below), whose sum is σ = 3416056003584. Its totient is φ = 325338666976.

The previous prime is 1220020001219. The next prime is 1220020001251. The reversal of 1220020001220 is 221000200221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1220020001196 and 1220020001205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10166833284 + ... + 10166833403.

It is an arithmetic number, because the mean of its divisors is an integer number (142335666816).

Almost surely, 2^{1220020001220} is an apocalyptic number.

1220020001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220020001220 is an abundant number, since it is smaller than the sum of its proper divisors (2196036002364).

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

1220020001220 is a wasteful number, since it uses less digits than its factorization.

1220020001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20333666699 (or 20333666697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1220020001220 its reverse (221000200221), we get a palindrome (1441020201441).

The spelling of 1220020001220 in words is "one trillion, two hundred twenty billion, twenty million, one thousand, two hundred twenty".