21110020042331 has 16 divisors (see below), whose sum is σ = 24427543546080. Its totient is φ = 18029621767680.

The previous prime is 21110020042327. The next prime is 21110020042339. The reversal of 21110020042331 is 13324002001112.

It is a cyclic number.

It is not a de Polignac number, because 21110020042331 - 2² = 21110020042327 is a prime.

It is a super-2 number, since 2×21110020042331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21110020042339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101231396 + ... + 101439713.

It is an arithmetic number, because the mean of its divisors is an integer number (1526721471630).

Almost surely, 2^{21110020042331} is an apocalyptic number.

21110020042331 is a deficient number, since it is larger than the sum of its proper divisors (3317523503749).

21110020042331 is a wasteful number, since it uses less digits than its factorization.

21110020042331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202671694.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21110020042331 its reverse (13324002001112), we get a palindrome (34434022043443).

The spelling of 21110020042331 in words is "twenty-one trillion, one hundred ten billion, twenty million, forty-two thousand, three hundred thirty-one".