20110221102021 has 16 divisors (see below), whose sum is σ = 27350477445120. Its totient is φ = 13139762430960.

The previous prime is 20110221102017. The next prime is 20110221102071. The reversal of 20110221102021 is 12020112201102.

It is not a de Polignac number, because 20110221102021 - 2² = 20110221102017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110221102071) 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, 171568405 + ... + 171685578.

It is an arithmetic number, because the mean of its divisors is an integer number (1709404840320).

Almost surely, 2^{20110221102021} is an apocalyptic number.

It is an amenable number.

20110221102021 is a deficient number, since it is larger than the sum of its proper divisors (7240256343099).

20110221102021 is a wasteful number, since it uses less digits than its factorization.

20110221102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343254376.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20110221102021 its reverse (12020112201102), we get a palindrome (32130333303123).

The spelling of 20110221102021 in words is "twenty trillion, one hundred ten billion, two hundred twenty-one million, one hundred two thousand, twenty-one".