231001101021 has 16 divisors (see below), whose sum is σ = 318089030400. Its totient is φ = 149030585088.

The previous prime is 231001100999. The next prime is 231001101029. The reversal of 231001101021 is 120101100132.

It is not a de Polignac number, because 231001101021 - 2⁷ = 231001100893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231001100988 and 231001101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231001101029) 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, 9191416 + ... + 9216513.

It is an arithmetic number, because the mean of its divisors is an integer number (19880564400).

Almost surely, 2^231001101021 is an apocalyptic number.

It is an amenable number.

231001101021 is a deficient number, since it is larger than the sum of its proper divisors (87087929379).

231001101021 is a wasteful number, since it uses less digits than its factorization.

231001101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18408068.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 231001101021 its reverse (120101100132), we get a palindrome (351102201153).

The spelling of 231001101021 in words is "two hundred thirty-one billion, one million, one hundred one thousand, twenty-one".