12040455021 has 48 divisors (see below), whose sum is σ = 19506858624. Its totient is φ = 6470005248.

The previous prime is 12040454957. The next prime is 12040455043. The reversal of 12040455021 is 12055404021.

It is not a de Polignac number, because 12040455021 - 2⁶ = 12040454957 is a prime.

It is a super-2 number, since 2×12040455021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12040454982 and 12040455000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040455121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1032801 + ... + 1044393.

It is an arithmetic number, because the mean of its divisors is an integer number (406392888).

Almost surely, 2^12040455021 is an apocalyptic number.

It is an amenable number.

12040455021 is a deficient number, since it is larger than the sum of its proper divisors (7466403603).

12040455021 is a wasteful number, since it uses less digits than its factorization.

12040455021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11778 (or 11759 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 12040455021 its reverse (12055404021), we get a palindrome (24095859042).

It can be divided in two parts, 12040 and 455021, that added together give a triangular number (467061 = T₉₆₆).

The spelling of 12040455021 in words is "twelve billion, forty million, four hundred fifty-five thousand, twenty-one".