231011221030 has 32 divisors (see below), whose sum is σ = 418213969920. Its totient is φ = 91873945440.

The previous prime is 231011221027. The next prime is 231011221039. The reversal of 231011221030 is 30122110132.

It is a junction number, because it is equal to n+sod(n) for n = 231011220995 and 231011221013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011221039) 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, 1232251 + ... + 1407289.

It is an arithmetic number, because the mean of its divisors is an integer number (13069186560).

Almost surely, 2^231011221030 is an apocalyptic number.

231011221030 is a deficient number, since it is larger than the sum of its proper divisors (187202748890).

231011221030 is a wasteful number, since it uses less digits than its factorization.

231011221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175804.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 231011221030 its reverse (30122110132), we get a palindrome (261133331162).

The spelling of 231011221030 in words is "two hundred thirty-one billion, eleven million, two hundred twenty-one thousand, thirty".