2221110222121 has 4 divisors (see below), whose sum is σ = 2538411682432. Its totient is φ = 1903808761812.

The previous prime is 2221110222077. The next prime is 2221110222127. The reversal of 2221110222121 is 1212220111222.

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 2221110222121 - 2²¹ = 2221108124969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221110222127) 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, 158650730145 + ... + 158650730158.

It is an arithmetic number, because the mean of its divisors is an integer number (634602920608).

Almost surely, 2^{2221110222121} is an apocalyptic number.

It is an amenable number.

2221110222121 is a deficient number, since it is larger than the sum of its proper divisors (317301460311).

2221110222121 is an equidigital number, since it uses as much as digits as its factorization.

2221110222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317301460310.

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

Adding to 2221110222121 its reverse (1212220111222), we get a palindrome (3433330333343).

The spelling of 2221110222121 in words is "two trillion, two hundred twenty-one billion, one hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".