21120241321 has 8 divisors (see below), whose sum is σ = 21697288640. Its totient is φ = 20543521968.

The previous prime is 21120241309. The next prime is 21120241381. The reversal of 21120241321 is 12314202112.

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 21120241321 - 2⁹ = 21120240809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120241381) 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, 51490 + ... + 211876.

It is an arithmetic number, because the mean of its divisors is an integer number (2712161080).

Almost surely, 2^21120241321 is an apocalyptic number.

It is an amenable number.

21120241321 is a deficient number, since it is larger than the sum of its proper divisors (577047319).

21120241321 is a wasteful number, since it uses less digits than its factorization.

21120241321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163983.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21120241321 its reverse (12314202112), we get a palindrome (33434443433).

The spelling of 21120241321 in words is "twenty-one billion, one hundred twenty million, two hundred forty-one thousand, three hundred twenty-one".