12201121110 has 64 divisors (see below), whose sum is σ = 30097105344. Its totient is φ = 3163276800.

The previous prime is 12201121103. The next prime is 12201121123. The reversal of 12201121110 is 1112110221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1795920 + ... + 1802700.

It is an arithmetic number, because the mean of its divisors is an integer number (470267271).

Almost surely, 2^12201121110 is an apocalyptic number.

12201121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12201121110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15048552672).

12201121110 is an abundant number, since it is smaller than the sum of its proper divisors (17895984234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12201121110 is a wasteful number, since it uses less digits than its factorization.

12201121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8449.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12201121110 its reverse (1112110221), we get a palindrome (13313231331).

The spelling of 12201121110 in words is "twelve billion, two hundred one million, one hundred twenty-one thousand, one hundred ten".