21123144132112 has 80 divisors (see below), whose sum is σ = 45553527137664. Its totient is φ = 9408360960000.

The previous prime is 21123144132073. The next prime is 21123144132113.

21123144132112 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21123144132113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4400964 + ... + 7849507.

Almost surely, 2^{21123144132112} is an apocalyptic number.

21123144132112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21123144132112 is an abundant number, since it is smaller than the sum of its proper divisors (24430383005552).

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

21123144132112 is a wasteful number, since it uses less digits than its factorization.

21123144132112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12250688 (or 12250682 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

It can be divided in two parts, 2112314 and 4132112, that added together give a palindrome (6244426).

The spelling of 21123144132112 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred forty-four million, one hundred thirty-two thousand, one hundred twelve".