1220220200121 has 32 divisors (see below), whose sum is σ = 1759110296832. Its totient is φ = 747907399680.

The previous prime is 1220220200107. The next prime is 1220220200141. The reversal of 1220220200121 is 1210020220221.

It is not a de Polignac number, because 1220220200121 - 2⁷ = 1220220199993 is a prime.

It is a super-4 number, since 4×1220220200121⁴ (a number of 49 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220220200121.

It is not an unprimeable number, because it can be changed into a prime (1220220200141) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 26530681 + ... + 26576633.

It is an arithmetic number, because the mean of its divisors is an integer number (54972196776).

Almost surely, 2^{1220220200121} is an apocalyptic number.

It is an amenable number.

1220220200121 is a deficient number, since it is larger than the sum of its proper divisors (538890096711).

1220220200121 is a wasteful number, since it uses less digits than its factorization.

1220220200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48673.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220220200121 its reverse (1210020220221), we get a palindrome (2430240420342).

The spelling of 1220220200121 in words is "one trillion, two hundred twenty billion, two hundred twenty million, two hundred thousand, one hundred twenty-one".