21142331103 has 8 divisors (see below), whose sum is σ = 28337366016. Its totient is φ = 14021091800.

The previous prime is 21142331087. The next prime is 21142331107. The reversal of 21142331103 is 30113324112.

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

It is a cyclic number.

It is not a de Polignac number, because 21142331103 - 2⁴ = 21142331087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21142331103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142331107) 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, 18448233 + ... + 18449378.

It is an arithmetic number, because the mean of its divisors is an integer number (3542170752).

Almost surely, 2^21142331103 is an apocalyptic number.

21142331103 is a deficient number, since it is larger than the sum of its proper divisors (7195034913).

21142331103 is a wasteful number, since it uses less digits than its factorization.

21142331103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36897805.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21142331103 its reverse (30113324112), we get a palindrome (51255655215).

The spelling of 21142331103 in words is "twenty-one billion, one hundred forty-two million, three hundred thirty-one thousand, one hundred three".