231100227121 has 4 divisors (see below), whose sum is σ = 239069200500. Its totient is φ = 223131253744.

The previous prime is 231100227053. The next prime is 231100227139. The reversal of 231100227121 is 121722001132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134167631521 + 96932595600 = 366289^2 + 311340^2 .

It is a cyclic number.

It is not a de Polignac number, because 231100227121 - 2²⁹ = 230563356209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231100227092 and 231100227101.

It is not an unprimeable number, because it can be changed into a prime (231100227191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3984486646 + ... + 3984486703.

It is an arithmetic number, because the mean of its divisors is an integer number (59767300125).

Almost surely, 2^231100227121 is an apocalyptic number.

It is an amenable number.

231100227121 is a deficient number, since it is larger than the sum of its proper divisors (7968973379).

231100227121 is an equidigital number, since it uses as much as digits as its factorization.

231100227121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7968973378.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 231100227121 its reverse (121722001132), we get a palindrome (352822228253).

The spelling of 231100227121 in words is "two hundred thirty-one billion, one hundred million, two hundred twenty-seven thousand, one hundred twenty-one".