21122032231 has 8 divisors (see below), whose sum is σ = 21854178720. Its totient is φ = 20390139168.

The previous prime is 21122032223. The next prime is 21122032237. The reversal of 21122032231 is 13223022112.

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 21122032231 - 2³ = 21122032223 is a prime.

It is a super-2 number, since 2×21122032231² (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 = 21122032199 and 21122032208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122032237) 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, 114750 + ... + 235396.

It is an arithmetic number, because the mean of its divisors is an integer number (2731772340).

Almost surely, 2^21122032231 is an apocalyptic number.

21122032231 is a deficient number, since it is larger than the sum of its proper divisors (732146489).

21122032231 is a wasteful number, since it uses less digits than its factorization.

21122032231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126713.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21122032231 its reverse (13223022112), we get a palindrome (34345054343).

The spelling of 21122032231 in words is "twenty-one billion, one hundred twenty-two million, thirty-two thousand, two hundred thirty-one".