220202010121 has 4 divisors (see below), whose sum is σ = 222676190100. Its totient is φ = 217727830144.

The previous prime is 220202010113. The next prime is 220202010131. The reversal of 220202010121 is 121010202022.

It is a happy number.

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 30628850121 + 189573160000 = 175011^2 + 435400^2 .

It is a cyclic number.

It is not a de Polignac number, because 220202010121 - 2³ = 220202010113 is a prime.

It is a super-2 number, since 2×220202010121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220202010131) 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, 1237089856 + ... + 1237090033.

It is an arithmetic number, because the mean of its divisors is an integer number (55669047525).

Almost surely, 2^220202010121 is an apocalyptic number.

It is an amenable number.

220202010121 is a deficient number, since it is larger than the sum of its proper divisors (2474179979).

220202010121 is an equidigital number, since it uses as much as digits as its factorization.

220202010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474179978.

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

Adding to 220202010121 its reverse (121010202022), we get a palindrome (341212212143).

The spelling of 220202010121 in words is "two hundred twenty billion, two hundred two million, ten thousand, one hundred twenty-one".