220201002121 has 4 divisors (see below), whose sum is σ = 222338876032. Its totient is φ = 218063128212.

The previous prime is 220201002089. The next prime is 220201002157. The reversal of 220201002121 is 121200102022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220201002121 - 2⁵ = 220201002089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220201005121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068936801 + ... + 1068937006.

It is an arithmetic number, because the mean of its divisors is an integer number (55584719008).

Almost surely, 2^220201002121 is an apocalyptic number.

It is an amenable number.

220201002121 is a deficient number, since it is larger than the sum of its proper divisors (2137873911).

220201002121 is a wasteful number, since it uses less digits than its factorization.

220201002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137873910.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 220201002121 its reverse (121200102022), we get a palindrome (341401104143).

Subtracting from 220201002121 its reverse (121200102022), we obtain a palindrome (99000900099).

The spelling of 220201002121 in words is "two hundred twenty billion, two hundred one million, two thousand, one hundred twenty-one".