21234412131304 has 32 divisors (see below), whose sum is σ = 41463863145000. Its totient is φ = 10182296196352.

The previous prime is 21234412131293. The next prime is 21234412131307. The reversal of 21234412131304 is 40313121443212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17657661218404 + 3576750912900 = 4202102^2 + 1891230^2 .

It is not an unprimeable number, because it can be changed into a prime (21234412131307) 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, 307105159 + ... + 307174294.

Almost surely, 2^{21234412131304} is an apocalyptic number.

It is an amenable number.

21234412131304 is a deficient number, since it is larger than the sum of its proper divisors (20229451013696).

21234412131304 is a wasteful number, since it uses less digits than its factorization.

21234412131304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614279637 (or 614279633 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 21234412131304 its reverse (40313121443212), we get a palindrome (61547533574516).

The spelling of 21234412131304 in words is "twenty-one trillion, two hundred thirty-four billion, four hundred twelve million, one hundred thirty-one thousand, three hundred four".