21661140245233 has 8 divisors (see below), whose sum is σ = 22919341196000. Its totient is φ = 20414753388288.

The previous prime is 21661140245221. The next prime is 21661140245257. The reversal of 21661140245233 is 33254204116612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21661140245233 - 2⁹ = 21661140244721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21661140245263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2953519683 + ... + 2953527016.

It is an arithmetic number, because the mean of its divisors is an integer number (2864917649500).

Almost surely, 2^{21661140245233} is an apocalyptic number.

It is an amenable number.

21661140245233 is a deficient number, since it is larger than the sum of its proper divisors (1258200950767).

21661140245233 is a wasteful number, since it uses less digits than its factorization.

21661140245233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5907046911.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 21661140245233 in words is "twenty-one trillion, six hundred sixty-one billion, one hundred forty million, two hundred forty-five thousand, two hundred thirty-three".