2201221100121 has 4 divisors (see below), whose sum is σ = 2934961466832. Its totient is φ = 1467480733412.

The previous prime is 2201221100069. The next prime is 2201221100149. The reversal of 2201221100121 is 1210011221022.

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 2201221100121 - 2¹¹ = 2201221098073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2201221100121.

It is not an unprimeable number, because it can be changed into a prime (2201221100521) 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, 366870183351 + ... + 366870183356.

It is an arithmetic number, because the mean of its divisors is an integer number (733740366708).

Almost surely, 2^{2201221100121} is an apocalyptic number.

It is an amenable number.

2201221100121 is a deficient number, since it is larger than the sum of its proper divisors (733740366711).

2201221100121 is an equidigital number, since it uses as much as digits as its factorization.

2201221100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733740366710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2201221100121 its reverse (1210011221022), we get a palindrome (3411232321143).

The spelling of 2201221100121 in words is "two trillion, two hundred one billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-one".