21120103331 has 8 divisors (see below), whose sum is σ = 21171273984. Its totient is φ = 21068970120.

The previous prime is 21120103321. The next prime is 21120103337. The reversal of 21120103331 is 13330102112.

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 21120103331 - 2¹⁰ = 21120102307 is a prime.

It is a super-2 number, since 2×21120103331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120103337) 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, 1353866 + ... + 1369376.

It is an arithmetic number, because the mean of its divisors is an integer number (2646409248).

Almost surely, 2^21120103331 is an apocalyptic number.

21120103331 is a deficient number, since it is larger than the sum of its proper divisors (51170653).

21120103331 is a wasteful number, since it uses less digits than its factorization.

21120103331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18721.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21120103331 its reverse (13330102112), we get a palindrome (34450205443).

The spelling of 21120103331 in words is "twenty-one billion, one hundred twenty million, one hundred three thousand, three hundred thirty-one".