220001211221122 has 4 divisors (see below), whose sum is σ = 330001816831686. Its totient is φ = 110000605610560.

The previous prime is 220001211221117. The next prime is 220001211221149. The reversal of 220001211221122 is 221122112100022.

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., 110893346809281 + 109107864411841 = 10530591^2 + 10445471^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 220001211221122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55000302805279 + ... + 55000302805282.

Almost surely, 2^{220001211221122} is an apocalyptic number.

220001211221122 is a deficient number, since it is larger than the sum of its proper divisors (110000605610564).

220001211221122 is a wasteful number, since it uses less digits than its factorization.

220001211221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110000605610563.

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

Adding to 220001211221122 its reverse (221122112100022), we get a palindrome (441123323321144).

The spelling of 220001211221122 in words is "two hundred twenty trillion, one billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-two".