2221111220122 has 4 divisors (see below), whose sum is σ = 3331666830186. Its totient is φ = 1110555610060.

The previous prime is 2221111220093. The next prime is 2221111220161. The reversal of 2221111220122 is 2210221111222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2208436738561 + 12674481561 = 1486081^2 + 112581^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2221111220122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555277805029 + ... + 555277805032.

Almost surely, 2^{2221111220122} is an apocalyptic number.

2221111220122 is a deficient number, since it is larger than the sum of its proper divisors (1110555610064).

2221111220122 is a wasteful number, since it uses less digits than its factorization.

2221111220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110555610063.

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

Adding to 2221111220122 its reverse (2210221111222), we get a palindrome (4431332331344).

The spelling of 2221111220122 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-two".