11121721324 has 48 divisors (see below), whose sum is σ = 22975160320. Its totient is φ = 4609846080.

The previous prime is 11121721313. The next prime is 11121721327. The reversal of 11121721324 is 42312712111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11121721327) 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, 1966669 + ... + 1972315.

Almost surely, 2^11121721324 is an apocalyptic number.

11121721324 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11121721324 is an abundant number, since it is smaller than the sum of its proper divisors (11853438996).

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

11121721324 is a wasteful number, since it uses less digits than its factorization.

11121721324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958 (or 7956 counting only the distinct ones).

The product of its digits is 672, while the sum is 25.

The spelling of 11121721324 in words is "eleven billion, one hundred twenty-one million, seven hundred twenty-one thousand, three hundred twenty-four".