1201002220020 has 96 divisors (see below), whose sum is σ = 3474374738688. Its totient is φ = 309745354752.

The previous prime is 1201002220009. The next prime is 1201002220027. The reversal of 1201002220020 is 200222001021.

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 = 1201002219978 and 1201002220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201002220027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1248997 + ... + 1990476.

It is an arithmetic number, because the mean of its divisors is an integer number (36191403528).

Almost surely, 2^{1201002220020} is an apocalyptic number.

1201002220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201002220020 is an abundant number, since it is smaller than the sum of its proper divisors (2273372518668).

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

1201002220020 is a wasteful number, since it uses less digits than its factorization.

1201002220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239689 (or 3239687 counting only the distinct ones).

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

Adding to 1201002220020 its reverse (200222001021), we get a palindrome (1401224221041).

The spelling of 1201002220020 in words is "one trillion, two hundred one billion, two million, two hundred twenty thousand, twenty".