21231423104452 has 48 divisors (see below), whose sum is σ = 40644642931200. Its totient is φ = 9624022553600.

The previous prime is 21231423104447. The next prime is 21231423104467. The reversal of 21231423104452 is 25440132413212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34113549 + ... + 34730347.

It is an arithmetic number, because the mean of its divisors is an integer number (846763394400).

Almost surely, 2^{21231423104452} is an apocalyptic number.

21231423104452 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21231423104452 is a deficient number, since it is larger than the sum of its proper divisors (19413219826748).

21231423104452 is a wasteful number, since it uses less digits than its factorization.

21231423104452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618972 (or 618970 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 21231423104452 its reverse (25440132413212), we get a palindrome (46671555517664).

The spelling of 21231423104452 in words is "twenty-one trillion, two hundred thirty-one billion, four hundred twenty-three million, one hundred four thousand, four hundred fifty-two".