21311233030 has 32 divisors (see below), whose sum is σ = 40440176640. Its totient is φ = 8073982560.

The previous prime is 21311233019. The next prime is 21311233033. The reversal of 21311233030 is 3033211312.

It is a junction number, because it is equal to n+sod(n) for n = 21311232989 and 21311233007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311233033) 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, 716770 + ... + 745909.

It is an arithmetic number, because the mean of its divisors is an integer number (1263755520).

Almost surely, 2^21311233030 is an apocalyptic number.

21311233030 is a deficient number, since it is larger than the sum of its proper divisors (19128943610).

21311233030 is a wasteful number, since it uses less digits than its factorization.

21311233030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462764.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21311233030 its reverse (3033211312), we get a palindrome (24344444342).

The spelling of 21311233030 in words is "twenty-one billion, three hundred eleven million, two hundred thirty-three thousand, thirty".