20110121222 has 16 divisors (see below), whose sum is σ = 30397373712. Its totient is φ = 9977721600.

The previous prime is 20110121179. The next prime is 20110121233. The reversal of 20110121222 is 22212101102.

It is a junction number, because it is equal to n+sod(n) for n = 20110121197 and 20110121206.

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, 754373 + ... + 780575.

It is an arithmetic number, because the mean of its divisors is an integer number (1899835857).

Almost surely, 2^20110121222 is an apocalyptic number.

20110121222 is a deficient number, since it is larger than the sum of its proper divisors (10287252490).

20110121222 is a wasteful number, since it uses less digits than its factorization.

20110121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29143.

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

Adding to 20110121222 its reverse (22212101102), we get a palindrome (42322222324).

The spelling of 20110121222 in words is "twenty billion, one hundred ten million, one hundred twenty-one thousand, two hundred twenty-two".