21222031301231 has 24 divisors (see below), whose sum is σ = 22440571534080. Its totient is φ = 20066162797296.

The previous prime is 21222031301183. The next prime is 21222031301267. The reversal of 21222031301231 is 13210313022212.

It is not a de Polignac number, because 21222031301231 - 2⁶ = 21222031301167 is a prime.

It is a super-2 number, since 2×21222031301231² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21222031301197 and 21222031301206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222031301291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25802300 + ... + 26612078.

It is an arithmetic number, because the mean of its divisors is an integer number (935023813920).

Almost surely, 2^{21222031301231} is an apocalyptic number.

21222031301231 is a deficient number, since it is larger than the sum of its proper divisors (1218540232849).

21222031301231 is a wasteful number, since it uses less digits than its factorization.

21222031301231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810395 (or 810372 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21222031301231 its reverse (13210313022212), we get a palindrome (34432344323443).

The spelling of 21222031301231 in words is "twenty-one trillion, two hundred twenty-two billion, thirty-one million, three hundred one thousand, two hundred thirty-one".