220121220002 has 4 divisors (see below), whose sum is σ = 330181830006. Its totient is φ = 110060610000.

The previous prime is 220121219951. The next prime is 220121220097. The reversal of 220121220002 is 200022121022.

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., 198685039081 + 21436180921 = 445741^2 + 146411^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55030304999 + ... + 55030305002.

Almost surely, 2^220121220002 is an apocalyptic number.

220121220002 is a deficient number, since it is larger than the sum of its proper divisors (110060610004).

220121220002 is a wasteful number, since it uses less digits than its factorization.

220121220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110060610003.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 220121220002 its reverse (200022121022), we get a palindrome (420143341024).

The spelling of 220121220002 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred twenty thousand, two".