21067127125 has 16 divisors (see below), whose sum is σ = 28681937856. Its totient is φ = 15321546000.

The previous prime is 21067127099. The next prime is 21067127131. The reversal of 21067127125 is 52172176012.

It is not a de Polignac number, because 21067127125 - 2⁵ = 21067127093 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7659399 + ... + 7662148.

It is an arithmetic number, because the mean of its divisors is an integer number (1792621116).

Almost surely, 2^21067127125 is an apocalyptic number.

21067127125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21067127125 is a deficient number, since it is larger than the sum of its proper divisors (7614810731).

21067127125 is a wasteful number, since it uses less digits than its factorization.

21067127125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15321573 (or 15321563 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 34.

The spelling of 21067127125 in words is "twenty-one billion, sixty-seven million, one hundred twenty-seven thousand, one hundred twenty-five".