21145450012 has 6 divisors (see below), whose sum is σ = 37004537528. Its totient is φ = 10572725004.

The previous prime is 21145450009. The next prime is 21145450031. The reversal of 21145450012 is 21005454112.

It is a super-3 number, since 3×21145450012³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2643181248 + ... + 2643181255.

Almost surely, 2^21145450012 is an apocalyptic number.

It is an amenable number.

21145450012 is a deficient number, since it is larger than the sum of its proper divisors (15859087516).

21145450012 is a wasteful number, since it uses less digits than its factorization.

21145450012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286362507 (or 5286362505 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The spelling of 21145450012 in words is "twenty-one billion, one hundred forty-five million, four hundred fifty thousand, twelve".