21041313342345 has 24 divisors (see below), whose sum is σ = 36476955717696. Its totient is φ = 11220388882848.

The previous prime is 21041313342341. The next prime is 21041313342377. The reversal of 21041313342345 is 54324331314012.

21041313342345 is a `hidden beast` number, since 2 + 1 + 0 + 413 + 1 + 3 + 3 + 4 + 234 + 5 = 666.

It is not a de Polignac number, because 21041313342345 - 2² = 21041313342341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21041313342341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33958299 + ... + 34572368.

It is an arithmetic number, because the mean of its divisors is an integer number (1519873154904).

Almost surely, 2^{21041313342345} is an apocalyptic number.

It is an amenable number.

21041313342345 is a deficient number, since it is larger than the sum of its proper divisors (15435642375351).

21041313342345 is a wasteful number, since it uses less digits than its factorization.

21041313342345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68537501 (or 68537498 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

Adding to 21041313342345 its reverse (54324331314012), we get a palindrome (75365644656357).

The spelling of 21041313342345 in words is "twenty-one trillion, forty-one billion, three hundred thirteen million, three hundred forty-two thousand, three hundred forty-five".