200220222121 has 4 divisors (see below), whose sum is σ = 200227887700. Its totient is φ = 200212556544.

The previous prime is 200220222109. The next prime is 200220222131. The reversal of 200220222121 is 121222022002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137762714896 + 62457507225 = 371164^2 + 249915^2 .

It is a cyclic number.

It is not a de Polignac number, because 200220222121 - 2⁹ = 200220221609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200220222095 and 200220222104.

It is not an unprimeable number, because it can be changed into a prime (200220222101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3793476 + ... + 3845893.

It is an arithmetic number, because the mean of its divisors is an integer number (50056971925).

Almost surely, 2^200220222121 is an apocalyptic number.

It is an amenable number.

200220222121 is a deficient number, since it is larger than the sum of its proper divisors (7665579).

200220222121 is an equidigital number, since it uses as much as digits as its factorization.

200220222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7665578.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 200220222121 its reverse (121222022002), we get a palindrome (321442244123).

The spelling of 200220222121 in words is "two hundred billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".