21242278103 has 8 divisors (see below), whose sum is σ = 22666599600. Its totient is φ = 19848587328.

The previous prime is 21242278067. The next prime is 21242278129. The reversal of 21242278103 is 30187224212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21242278103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21242278103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242278703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7656248 + ... + 7659021.

It is an arithmetic number, because the mean of its divisors is an integer number (2833324950).

Almost surely, 2^21242278103 is an apocalyptic number.

21242278103 is a deficient number, since it is larger than the sum of its proper divisors (1424321497).

21242278103 is a wasteful number, since it uses less digits than its factorization.

21242278103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15315361.

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 21242278103 in words is "twenty-one billion, two hundred forty-two million, two hundred seventy-eight thousand, one hundred three".