21031241331 has 16 divisors (see below), whose sum is σ = 30982086144. Its totient is φ = 12622329984.

The previous prime is 21031241321. The next prime is 21031241333. The reversal of 21031241331 is 13314213012.

It is not a de Polignac number, because 21031241331 - 2⁹ = 21031240819 is a prime.

It is a super-2 number, since 2×21031241331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21031241298 and 21031241307.

It is not an unprimeable number, because it can be changed into a prime (21031241333) 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 15 ways as a sum of consecutive naturals, for example, 8963551 + ... + 8965896.

It is an arithmetic number, because the mean of its divisors is an integer number (1936380384).

Almost surely, 2^21031241331 is an apocalyptic number.

21031241331 is a deficient number, since it is larger than the sum of its proper divisors (9950844813).

21031241331 is a wasteful number, since it uses less digits than its factorization.

21031241331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17929490.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21031241331 its reverse (13314213012), we get a palindrome (34345454343).

The spelling of 21031241331 in words is "twenty-one billion, thirty-one million, two hundred forty-one thousand, three hundred thirty-one".