21312432225441 has 32 divisors (see below), whose sum is σ = 36084910848000. Its totient is φ = 12178407989520.

The previous prime is 21312432225397. The next prime is 21312432225443. The reversal of 21312432225441 is 14452223421312.

21312432225441 is a `hidden beast` number, since 2 + 131 + 2 + 43 + 22 + 25 + 441 = 666.

It is not a de Polignac number, because 21312432225441 - 2⁹ = 21312432224929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21312432225396 and 21312432225405.

It is not an unprimeable number, because it can be changed into a prime (21312432225443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19831596 + ... + 20878626.

It is an arithmetic number, because the mean of its divisors is an integer number (1127653464000).

Almost surely, 2^{21312432225441} is an apocalyptic number.

21312432225441 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21312432225441 is a deficient number, since it is larger than the sum of its proper divisors (14772478622559).

21312432225441 is a wasteful number, since it uses less digits than its factorization.

21312432225441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154746 (or 1154740 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

Adding to 21312432225441 its reverse (14452223421312), we get a palindrome (35764655646753).

The spelling of 21312432225441 in words is "twenty-one trillion, three hundred twelve billion, four hundred thirty-two million, two hundred twenty-five thousand, four hundred forty-one".