21231323141 has 6 divisors (see below), whose sum is σ = 24697661670. Its totient is φ = 18198276936.

The previous prime is 21231323131. The next prime is 21231323147. The reversal of 21231323141 is 14132313212.

It can be written as a sum of positive squares in only one way, i.e., 20053392100 + 1177931041 = 141610^2 + 34321^2 .

It is not a de Polignac number, because 21231323141 - 2⁶ = 21231323077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231323147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216646106 + ... + 216646203.

It is an arithmetic number, because the mean of its divisors is an integer number (4116276945).

Almost surely, 2^21231323141 is an apocalyptic number.

It is an amenable number.

21231323141 is a deficient number, since it is larger than the sum of its proper divisors (3466338529).

21231323141 is an equidigital number, since it uses as much as digits as its factorization.

21231323141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433292323 (or 433292316 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 21231323141 its reverse (14132313212), we get a palindrome (35363636353).

The spelling of 21231323141 in words is "twenty-one billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred forty-one".