20001221233022 has 16 divisors (see below), whose sum is σ = 30032859048192. Its totient is φ = 9990271820760.

The previous prime is 20001221233003. The next prime is 20001221233141. The reversal of 20001221233022 is 22033212210002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20001221232985 and 20001221233003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10237553 + ... + 12033699.

It is an arithmetic number, because the mean of its divisors is an integer number (1877053690512).

Almost surely, 2^{20001221233022} is an apocalyptic number.

20001221233022 is a deficient number, since it is larger than the sum of its proper divisors (10031637815170).

20001221233022 is a wasteful number, since it uses less digits than its factorization.

20001221233022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1801903.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20001221233022 its reverse (22033212210002), we get a palindrome (42034433443024).

The spelling of 20001221233022 in words is "twenty trillion, one billion, two hundred twenty-one million, two hundred thirty-three thousand, twenty-two".