21220112232231 has 32 divisors (see below), whose sum is σ = 31096736352000. Its totient is φ = 12764507834880.

The previous prime is 21220112232197. The next prime is 21220112232233. The reversal of 21220112232231 is 13223221102212.

It is not a de Polignac number, because 21220112232231 - 2³³ = 21211522297639 is a prime.

It is a super-2 number, since 2×21220112232231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220112232233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4713640 + ... + 8041058.

It is an arithmetic number, because the mean of its divisors is an integer number (971773011000).

Almost surely, 2^{21220112232231} is an apocalyptic number.

21220112232231 is a deficient number, since it is larger than the sum of its proper divisors (9876624119769).

21220112232231 is a wasteful number, since it uses less digits than its factorization.

21220112232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328879.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21220112232231 its reverse (13223221102212), we get a palindrome (34443333334443).

The spelling of 21220112232231 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, two hundred thirty-two thousand, two hundred thirty-one".