21244132103 has 4 divisors (see below), whose sum is σ = 21245554008. Its totient is φ = 21242710200.

The previous prime is 21244132099. The next prime is 21244132109. The reversal of 21244132103 is 30123144212.

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 21244132103 - 2² = 21244132099 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 (21244132109) 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, 688301 + ... + 718502.

It is an arithmetic number, because the mean of its divisors is an integer number (5311388502).

Almost surely, 2^21244132103 is an apocalyptic number.

21244132103 is a deficient number, since it is larger than the sum of its proper divisors (1421905).

21244132103 is a wasteful number, since it uses less digits than its factorization.

21244132103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421904.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21244132103 its reverse (30123144212), we get a palindrome (51367276315).

The spelling of 21244132103 in words is "twenty-one billion, two hundred forty-four million, one hundred thirty-two thousand, one hundred three".