21123133132112 has 40 divisors (see below), whose sum is σ = 44715628141632. Its totient is φ = 9586584185600.

The previous prime is 21123133132091. The next prime is 21123133132177.

21123133132112 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21123133132112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92635589 + ... + 92863332.

Almost surely, 2^{21123133132112} is an apocalyptic number.

21123133132112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21123133132112 is an abundant number, since it is smaller than the sum of its proper divisors (23592495009520).

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

21123133132112 is a wasteful number, since it uses less digits than its factorization.

21123133132112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185499587 (or 185499581 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

It can be divided in two parts, 2112313 and 3132112, that added together give a palindrome (5244425).

The spelling of 21123133132112 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred thirty-three million, one hundred thirty-two thousand, one hundred twelve".