21253031131222 has 48 divisors (see below), whose sum is σ = 35490007269360. Its totient is φ = 9537062641920.

The previous prime is 21253031131219. The next prime is 21253031131243. The reversal of 21253031131222 is 22213113035212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13081618 + ... + 14616250.

It is an arithmetic number, because the mean of its divisors is an integer number (739375151445).

Almost surely, 2^{21253031131222} is an apocalyptic number.

21253031131222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21253031131222 is a deficient number, since it is larger than the sum of its proper divisors (14236976138138).

21253031131222 is a wasteful number, since it uses less digits than its factorization.

21253031131222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535389 (or 1535378 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21253031131222 its reverse (22213113035212), we get a palindrome (43466144166434).

The spelling of 21253031131222 in words is "twenty-one trillion, two hundred fifty-three billion, thirty-one million, one hundred thirty-one thousand, two hundred twenty-two".