21430222103 has 4 divisors (see below), whose sum is σ = 21455765520. Its totient is φ = 21404678688.

The previous prime is 21430221997. The next prime is 21430222111. The reversal of 21430222103 is 30122203412.

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 21430222103 - 2¹⁶ = 21430156567 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 (21430222153) 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, 12770450 + ... + 12772127.

It is an arithmetic number, because the mean of its divisors is an integer number (5363941380).

Almost surely, 2^21430222103 is an apocalyptic number.

21430222103 is a deficient number, since it is larger than the sum of its proper divisors (25543417).

21430222103 is an equidigital number, since it uses as much as digits as its factorization.

21430222103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25543416.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21430222103 its reverse (30122203412), we get a palindrome (51552425515).

The spelling of 21430222103 in words is "twenty-one billion, four hundred thirty million, two hundred twenty-two thousand, one hundred three".