13111221100 has 36 divisors (see below), whose sum is σ = 30124962504. Its totient is φ = 4935988480.

The previous prime is 13111221091. The next prime is 13111221107. The reversal of 13111221100 is 112211131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13111221107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3854542 + ... + 3857941.

It is an arithmetic number, because the mean of its divisors is an integer number (836804514).

Almost surely, 2^13111221100 is an apocalyptic number.

13111221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111221100 is an abundant number, since it is smaller than the sum of its proper divisors (17013741404).

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

13111221100 is a wasteful number, since it uses less digits than its factorization.

13111221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712514 (or 7712507 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 13111221100 its reverse (112211131), we get a palindrome (13223432231).

The spelling of 13111221100 in words is "thirteen billion, one hundred eleven million, two hundred twenty-one thousand, one hundred".