20110122221 has 8 divisors (see below), whose sum is σ = 23210552064. Its totient is φ = 17066581200.

The previous prime is 20110122199. The next prime is 20110122233. The reversal of 20110122221 is 12222101102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20110122221 - 2⁶ = 20110122157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110122196 and 20110122205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110122521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14221445 + ... + 14222858.

It is an arithmetic number, because the mean of its divisors is an integer number (2901319008).

Almost surely, 2^20110122221 is an apocalyptic number.

It is an amenable number.

20110122221 is a deficient number, since it is larger than the sum of its proper divisors (3100429843).

20110122221 is a wasteful number, since it uses less digits than its factorization.

20110122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28444411.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20110122221 its reverse (12222101102), we get a palindrome (32332223323).

It can be divided in two parts, 201101 and 22221, that added together give a palindrome (223322).

The spelling of 20110122221 in words is "twenty billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".