21120332031 has 6 divisors (see below), whose sum is σ = 30507146280. Its totient is φ = 14080221348.

The previous prime is 21120332003. The next prime is 21120332047. The reversal of 21120332031 is 13023302112.

It is not a de Polignac number, because 21120332031 - 2¹⁴ = 21120315647 is a prime.

It is a super-3 number, since 3×21120332031³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21120331995 and 21120332013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120332071) 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 5 ways as a sum of consecutive naturals, for example, 1173351771 + ... + 1173351788.

It is an arithmetic number, because the mean of its divisors is an integer number (5084524380).

Almost surely, 2^21120332031 is an apocalyptic number.

21120332031 is a deficient number, since it is larger than the sum of its proper divisors (9386814249).

21120332031 is a wasteful number, since it uses less digits than its factorization.

21120332031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346703565 (or 2346703562 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21120332031 its reverse (13023302112), we get a palindrome (34143634143).

The spelling of 21120332031 in words is "twenty-one billion, one hundred twenty million, three hundred thirty-two thousand, thirty-one".