20001222110 has 32 divisors (see below), whose sum is σ = 36308844000. Its totient is φ = 7932539520.

The previous prime is 20001222091. The next prime is 20001222113. The reversal of 20001222110 is 1122210002.

It is a happy number.

It is a super-4 number, since 4×20001222110⁴ (a number of 42 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20001222091 and 20001222100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001222113) 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, 839036 + ... + 862544.

It is an arithmetic number, because the mean of its divisors is an integer number (1134651375).

Almost surely, 2^20001222110 is an apocalyptic number.

20001222110 is a deficient number, since it is larger than the sum of its proper divisors (16307621890).

20001222110 is a wasteful number, since it uses less digits than its factorization.

20001222110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24236.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20001222110 its reverse (1122210002), we get a palindrome (21123432112).

The spelling of 20001222110 in words is "twenty billion, one million, two hundred twenty-two thousand, one hundred ten".