20201221221110 has 32 divisors (see below), whose sum is σ = 37610722723392. Its totient is φ = 7806865489920.

The previous prime is 20201221221109. The next prime is 20201221221113. The reversal of 20201221221110 is 1112212210202.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201221221113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239138699 + ... + 239223158.

It is an arithmetic number, because the mean of its divisors is an integer number (1175335085106).

Almost surely, 2^{20201221221110} is an apocalyptic number.

20201221221110 is a deficient number, since it is larger than the sum of its proper divisors (17409501502282).

20201221221110 is a wasteful number, since it uses less digits than its factorization.

20201221221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478362008.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20201221221110 its reverse (1112212210202), we get a palindrome (21313433431312).

The spelling of 20201221221110 in words is "twenty trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred ten".