23331221031 has 8 divisors (see below), whose sum is σ = 31109290240. Its totient is φ = 15553649592.

The previous prime is 23331221009. The next prime is 23331221059. The reversal of 23331221031 is 13012213332.

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

It is not a de Polignac number, because 23331221031 - 2⁶ = 23331220967 is a prime.

It is a super-2 number, since 2×23331221031² (a number of 22 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 = 23331220989 and 23331221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23331221131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3810 + ... + 216048.

It is an arithmetic number, because the mean of its divisors is an integer number (3888661280).

Almost surely, 2^23331221031 is an apocalyptic number.

23331221031 is a deficient number, since it is larger than the sum of its proper divisors (7778069209).

23331221031 is a wasteful number, since it uses less digits than its factorization.

23331221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248885.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 23331221031 its reverse (13012213332), we get a palindrome (36343434363).

The spelling of 23331221031 in words is "twenty-three billion, three hundred thirty-one million, two hundred twenty-one thousand, thirty-one".