21140123303 has 24 divisors (see below), whose sum is σ = 23401366560. Its totient is φ = 19081695360.

The previous prime is 21140123299. The next prime is 21140123309. The reversal of 21140123303 is 30332104112.

It is not a de Polignac number, because 21140123303 - 2² = 21140123299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140123309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2781833 + ... + 2789421.

It is an arithmetic number, because the mean of its divisors is an integer number (975056940).

Almost surely, 2^21140123303 is an apocalyptic number.

21140123303 is a deficient number, since it is larger than the sum of its proper divisors (2261243257).

21140123303 is a wasteful number, since it uses less digits than its factorization.

21140123303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7979 (or 7966 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21140123303 its reverse (30332104112), we get a palindrome (51472227415).

The spelling of 21140123303 in words is "twenty-one billion, one hundred forty million, one hundred twenty-three thousand, three hundred three".