21322123033 has 4 divisors (see below), whose sum is σ = 21372769828. Its totient is φ = 21271476240.

The previous prime is 21322123003. The next prime is 21322123037. The reversal of 21322123033 is 33032122312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 236759769 + 21085363264 = 15387^2 + 145208^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322123033 - 2⁵ = 21322123001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21322122995 and 21322123013.

It is not an unprimeable number, because it can be changed into a prime (21322123037) 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, 25322766 + ... + 25323607.

It is an arithmetic number, because the mean of its divisors is an integer number (5343192457).

Almost surely, 2^21322123033 is an apocalyptic number.

It is an amenable number.

21322123033 is a deficient number, since it is larger than the sum of its proper divisors (50646795).

21322123033 is an equidigital number, since it uses as much as digits as its factorization.

21322123033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50646794.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21322123033 its reverse (33032122312), we get a palindrome (54354245345).

The spelling of 21322123033 in words is "twenty-one billion, three hundred twenty-two million, one hundred twenty-three thousand, thirty-three".