21403302122 has 8 divisors (see below), whose sum is σ = 32123484036. Its totient is φ = 10695474112.

The previous prime is 21403302121. The next prime is 21403302133. The reversal of 21403302122 is 22120330412.

It can be written as a sum of positive squares in 2 ways, for example, as 19636697161 + 1766604961 = 140131^2 + 42031^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21403302094 and 21403302103.

It is not an unprimeable number, because it can be changed into a prime (21403302121) 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, 3084143 + ... + 3091074.

Almost surely, 2^21403302122 is an apocalyptic number.

21403302122 is a deficient number, since it is larger than the sum of its proper divisors (10720181914).

21403302122 is a wasteful number, since it uses less digits than its factorization.

21403302122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6176952.

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

Adding to 21403302122 its reverse (22120330412), we get a palindrome (43523632534).

The spelling of 21403302122 in words is "twenty-one billion, four hundred three million, three hundred two thousand, one hundred twenty-two".