21110120331 has 8 divisors (see below), whose sum is σ = 28147952640. Its totient is φ = 14072850792.

The previous prime is 21110120323. The next prime is 21110120387. The reversal of 21110120331 is 13302101112.

It is a happy number.

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

It is not a de Polignac number, because 21110120331 - 2³ = 21110120323 is a prime.

It is a super-2 number, since 2×21110120331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21110120331.

It is not an unprimeable number, because it can be changed into a prime (21110120131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43591 + ... + 210048.

It is an arithmetic number, because the mean of its divisors is an integer number (3518494080).

Almost surely, 2^21110120331 is an apocalyptic number.

21110120331 is a deficient number, since it is larger than the sum of its proper divisors (7037832309).

21110120331 is a wasteful number, since it uses less digits than its factorization.

21110120331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281385.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21110120331 its reverse (13302101112), we get a palindrome (34412221443).

The spelling of 21110120331 in words is "twenty-one billion, one hundred ten million, one hundred twenty thousand, three hundred thirty-one".