21131222333 has 8 divisors (see below), whose sum is σ = 23044761600. Its totient is φ = 19258834608.

The previous prime is 21131222317. The next prime is 21131222369. The reversal of 21131222333 is 33322213112.

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

It is not a de Polignac number, because 21131222333 - 2⁴ = 21131222317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21131222299 and 21131222308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131722333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10286813 + ... + 10288866.

It is an arithmetic number, because the mean of its divisors is an integer number (2880595200).

Almost surely, 2^21131222333 is an apocalyptic number.

It is an amenable number.

21131222333 is a deficient number, since it is larger than the sum of its proper divisors (1913539267).

21131222333 is a wasteful number, since it uses less digits than its factorization.

21131222333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20575771.

The product of its digits is 1296, while the sum is 23.

Adding to 21131222333 its reverse (33322213112), we get a palindrome (54453435445).

The spelling of 21131222333 in words is "twenty-one billion, one hundred thirty-one million, two hundred twenty-two thousand, three hundred thirty-three".