11122121312 has 24 divisors (see below), whose sum is σ = 22405904136. Its totient is φ = 5431732992.

The previous prime is 11122121303. The next prime is 11122121323. The reversal of 11122121312 is 21312122111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040093 + ... + 4042844.

It is an arithmetic number, because the mean of its divisors is an integer number (933579339).

Almost surely, 2^11122121312 is an apocalyptic number.

It is an amenable number.

11122121312 is an abundant number, since it is smaller than the sum of its proper divisors (11283782824).

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

11122121312 is an equidigital number, since it uses as much as digits as its factorization.

11122121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082990 (or 8082982 counting only the distinct ones).

The product of its digits is 48, while the sum is 17.

Adding to 11122121312 its reverse (21312122111), we get a palindrome (32434243423).

The spelling of 11122121312 in words is "eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, three hundred twelve".