23311322021 has 4 divisors (see below), whose sum is σ = 25104500652. Its totient is φ = 21518143392.

The previous prime is 23311322003. The next prime is 23311322051. The reversal of 23311322021 is 12022311332.

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 8411457796 + 14899864225 = 91714^2 + 122065^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311322021 - 2³⁴ = 6131452837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23311321984 and 23311322002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311322051) 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, 896589296 + ... + 896589321.

It is an arithmetic number, because the mean of its divisors is an integer number (6276125163).

Almost surely, 2^23311322021 is an apocalyptic number.

It is an amenable number.

23311322021 is a deficient number, since it is larger than the sum of its proper divisors (1793178631).

23311322021 is a wasteful number, since it uses less digits than its factorization.

23311322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793178630.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23311322021 its reverse (12022311332), we get a palindrome (35333633353).

The spelling of 23311322021 in words is "twenty-three billion, three hundred eleven million, three hundred twenty-two thousand, twenty-one".