21231311122330 has 16 divisors (see below), whose sum is σ = 38314602597960. Its totient is φ = 8470692764992.

The previous prime is 21231311122309. The next prime is 21231311122421. The reversal of 21231311122330 is 3322111313212.

It can be written as a sum of positive squares in 4 ways, for example, as 15303454513369 + 5927856608961 = 3911963^2 + 2434719^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21231311122295 and 21231311122304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2728956409 + ... + 2728964188.

Almost surely, 2^{21231311122330} is an apocalyptic number.

21231311122330 is a deficient number, since it is larger than the sum of its proper divisors (17083291475630).

21231311122330 is a wasteful number, since it uses less digits than its factorization.

21231311122330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457920993.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21231311122330 its reverse (3322111313212), we get a palindrome (24553422435542).

It can be divided in two parts, 21231311 and 122330, that added together give a square (21353641 = 4621²).

The spelling of 21231311122330 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred eleven million, one hundred twenty-two thousand, three hundred thirty".