2211202221121 has 4 divisors (see below), whose sum is σ = 2224442953152. Its totient is φ = 2197961489092.

The previous prime is 2211202221119. The next prime is 2211202221229. The reversal of 2211202221121 is 1211222021122.

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 2211202221121 - 2¹ = 2211202221119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211202221421) 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, 6620365765 + ... + 6620366098.

It is an arithmetic number, because the mean of its divisors is an integer number (556110738288).

Almost surely, 2^{2211202221121} is an apocalyptic number.

It is an amenable number.

2211202221121 is a deficient number, since it is larger than the sum of its proper divisors (13240732031).

2211202221121 is a wasteful number, since it uses less digits than its factorization.

2211202221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13240732030.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2211202221121 its reverse (1211222021122), we get a palindrome (3422424242243).

The spelling of 2211202221121 in words is "two trillion, two hundred eleven billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-one".