1220200200021 has 16 divisors (see below), whose sum is σ = 1868249111040. Its totient is φ = 700593415920.

The previous prime is 1220200200017. The next prime is 1220200200083. The reversal of 1220200200021 is 1200020020221.

It is not a de Polignac number, because 1220200200021 - 2² = 1220200200017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220200200091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 973045785 + ... + 973047038.

It is an arithmetic number, because the mean of its divisors is an integer number (116765569440).

Almost surely, 2^{1220200200021} is an apocalyptic number.

1220200200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220200200021 is a deficient number, since it is larger than the sum of its proper divisors (648048911019).

1220200200021 is a wasteful number, since it uses less digits than its factorization.

1220200200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946092856.

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

Adding to 1220200200021 its reverse (1200020020221), we get a palindrome (2420220220242).

The spelling of 1220200200021 in words is "one trillion, two hundred twenty billion, two hundred million, two hundred thousand, twenty-one".