21207873611127 has 32 divisors (see below), whose sum is σ = 32334878822400. Its totient is φ = 12111991676928.

The previous prime is 21207873611011. The next prime is 21207873611137. The reversal of 21207873611127 is 72111637870212.

It is not a de Polignac number, because 21207873611127 - 2⁸ = 21207873610871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21207873611137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 457664503 + ... + 457710839.

It is an arithmetic number, because the mean of its divisors is an integer number (1010464963200).

Almost surely, 2^{21207873611127} is an apocalyptic number.

21207873611127 is a deficient number, since it is larger than the sum of its proper divisors (11127005211273).

21207873611127 is a wasteful number, since it uses less digits than its factorization.

21207873611127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58095.

The product of its (nonzero) digits is 395136, while the sum is 48.

The spelling of 21207873611127 in words is "twenty-one trillion, two hundred seven billion, eight hundred seventy-three million, six hundred eleven thousand, one hundred twenty-seven".