11121345345 has 48 divisors (see below), whose sum is σ = 20709440640. Its totient is φ = 5074967040.

The previous prime is 11121345299. The next prime is 11121345421. The reversal of 11121345345 is 54354312111.

It is not a de Polignac number, because 11121345345 - 2⁶ = 11121345281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149365 + ... + 211074.

It is an arithmetic number, because the mean of its divisors is an integer number (431446680).

Almost surely, 2^11121345345 is an apocalyptic number.

11121345345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11121345345 is a deficient number, since it is larger than the sum of its proper divisors (9588095295).

11121345345 is a wasteful number, since it uses less digits than its factorization.

11121345345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360486 (or 360475 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

Adding to 11121345345 its reverse (54354312111), we get a palindrome (65475657456).

The spelling of 11121345345 in words is "eleven billion, one hundred twenty-one million, three hundred forty-five thousand, three hundred forty-five".