12003511421 has 8 divisors (see below), whose sum is σ = 13783936800. Its totient is φ = 10337952240.

The previous prime is 12003511409. The next prime is 12003511427. The reversal of 12003511421 is 12411530021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12003511421 - 2²² = 11999317117 is a prime.

It is a super-3 number, since 3×12003511421³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12003511393 and 12003511402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003511427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28716326 + ... + 28716743.

It is an arithmetic number, because the mean of its divisors is an integer number (1722992100).

Almost surely, 2^12003511421 is an apocalyptic number.

12003511421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12003511421 is a deficient number, since it is larger than the sum of its proper divisors (1780425379).

12003511421 is a wasteful number, since it uses less digits than its factorization.

12003511421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57433099.

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 12003511421 in words is "twelve billion, three million, five hundred eleven thousand, four hundred twenty-one".