220121221022 has 4 divisors (see below), whose sum is σ = 330181831536. Its totient is φ = 110060610510.

The previous prime is 220121221003. The next prime is 220121221039. The reversal of 220121221022 is 220122121022.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55030305254 + ... + 55030305257.

It is an arithmetic number, because the mean of its divisors is an integer number (82545457884).

Almost surely, 2^220121221022 is an apocalyptic number.

220121221022 is a deficient number, since it is larger than the sum of its proper divisors (110060610514).

220121221022 is a wasteful number, since it uses less digits than its factorization.

220121221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110060610513.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 220121221022 its reverse (220122121022), we get a palindrome (440243342044).

The spelling of 220121221022 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty-two".