21514512103 has 4 divisors (see below), whose sum is σ = 24588013840. Its totient is φ = 18441010368.

The previous prime is 21514512091. The next prime is 21514512109. The reversal of 21514512103 is 30121541512.

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

It is a cyclic number.

It is not a de Polignac number, because 21514512103 - 2²¹ = 21512414951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514512109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1536750858 + ... + 1536750871.

It is an arithmetic number, because the mean of its divisors is an integer number (6147003460).

Almost surely, 2^21514512103 is an apocalyptic number.

21514512103 is a deficient number, since it is larger than the sum of its proper divisors (3073501737).

21514512103 is an equidigital number, since it uses as much as digits as its factorization.

21514512103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3073501736.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 21514512103 in words is "twenty-one billion, five hundred fourteen million, five hundred twelve thousand, one hundred three".