231321021113 has 64 divisors (see below), whose sum is σ = 311528706048. Its totient is φ = 166510632960.

The previous prime is 231321021109. The next prime is 231321021131. The reversal of 231321021113 is 311120123132.

It is a happy number.

It is not a de Polignac number, because 231321021113 - 2² = 231321021109 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231321021163) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52606631 + ... + 52611027.

It is an arithmetic number, because the mean of its divisors is an integer number (4867636032).

Almost surely, 2^231321021113 is an apocalyptic number.

It is an amenable number.

231321021113 is a deficient number, since it is larger than the sum of its proper divisors (80207684935).

231321021113 is a wasteful number, since it uses less digits than its factorization.

231321021113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231321021113 its reverse (311120123132), we get a palindrome (542441144245).

The spelling of 231321021113 in words is "two hundred thirty-one billion, three hundred twenty-one million, twenty-one thousand, one hundred thirteen".