21223002331 has 8 divisors (see below), whose sum is σ = 21583948400. Its totient is φ = 20862476640.

The previous prime is 21223002329. The next prime is 21223002373. The reversal of 21223002331 is 13320032212.

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

It is a cyclic number.

It is not a de Polignac number, because 21223002331 - 2¹ = 21223002329 is a prime.

It is a super-2 number, since 2×21223002331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223002299 and 21223002308.

It is not an unprimeable number, because it can be changed into a prime (21223006331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2421 + ... + 206038.

It is an arithmetic number, because the mean of its divisors is an integer number (2697993550).

Almost surely, 2^21223002331 is an apocalyptic number.

21223002331 is a deficient number, since it is larger than the sum of its proper divisors (360946069).

21223002331 is a wasteful number, since it uses less digits than its factorization.

21223002331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210189.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21223002331 its reverse (13320032212), we get a palindrome (34543034543).

The spelling of 21223002331 in words is "twenty-one billion, two hundred twenty-three million, two thousand, three hundred thirty-one".