21123134014 has 4 divisors (see below), whose sum is σ = 31684701024. Its totient is φ = 10561567006.

The previous prime is 21123134009. The next prime is 21123134069. The reversal of 21123134014 is 41043132112.

It is a semiprime because it is the product of two primes.

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, 5280783502 + ... + 5280783505.

It is an arithmetic number, because the mean of its divisors is an integer number (7921175256).

Almost surely, 2^21123134014 is an apocalyptic number.

21123134014 is a deficient number, since it is larger than the sum of its proper divisors (10561567010).

21123134014 is a wasteful number, since it uses less digits than its factorization.

21123134014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10561567009.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21123134014 its reverse (41043132112), we get a palindrome (62166266126).

The spelling of 21123134014 in words is "twenty-one billion, one hundred twenty-three million, one hundred thirty-four thousand, fourteen".