2201202220121 has 4 divisors (see below), whose sum is σ = 2223895026612. Its totient is φ = 2178509413632.

The previous prime is 2201202220081. The next prime is 2201202220159. The reversal of 2201202220121 is 1210222021022.

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 1816133569600 + 385068650521 = 1347640^2 + 620539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201202220121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2201202220121.

It is not an unprimeable number, because it can be changed into a prime (2201202220181) 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, 11346403100 + ... + 11346403293.

It is an arithmetic number, because the mean of its divisors is an integer number (555973756653).

Almost surely, 2^{2201202220121} is an apocalyptic number.

It is an amenable number.

2201202220121 is a deficient number, since it is larger than the sum of its proper divisors (22692806491).

2201202220121 is an equidigital number, since it uses as much as digits as its factorization.

2201202220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22692806490.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2201202220121 its reverse (1210222021022), we get a palindrome (3411424241143).

The spelling of 2201202220121 in words is "two trillion, two hundred one billion, two hundred two million, two hundred twenty thousand, one hundred twenty-one".