21127031703 has 12 divisors (see below), whose sum is σ = 32122972440. Its totient is φ = 13343388336.

The previous prime is 21127031701. The next prime is 21127031749. The reversal of 21127031703 is 30713072112.

It is not a de Polignac number, because 21127031703 - 2¹ = 21127031701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21127031701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61774776 + ... + 61775117.

It is an arithmetic number, because the mean of its divisors is an integer number (2676914370).

Almost surely, 2^21127031703 is an apocalyptic number.

21127031703 is a deficient number, since it is larger than the sum of its proper divisors (10995940737).

21127031703 is a wasteful number, since it uses less digits than its factorization.

21127031703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123549918 (or 123549915 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The spelling of 21127031703 in words is "twenty-one billion, one hundred twenty-seven million, thirty-one thousand, seven hundred three".