231150221011 has 4 divisors (see below), whose sum is σ = 231151182592. Its totient is φ = 231149259432.

The previous prime is 231150220997. The next prime is 231150221017. The reversal of 231150221011 is 110122051132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 231150221011 - 2⁷ = 231150220883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231150221011.

It is not an unprimeable number, because it can be changed into a prime (231150221017) 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, 235945 + ... + 719701.

It is an arithmetic number, because the mean of its divisors is an integer number (57787795648).

Almost surely, 2^231150221011 is an apocalyptic number.

231150221011 is a deficient number, since it is larger than the sum of its proper divisors (961581).

231150221011 is an equidigital number, since it uses as much as digits as its factorization.

231150221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961580.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 231150221011 its reverse (110122051132), we get a palindrome (341272272143).

The spelling of 231150221011 in words is "two hundred thirty-one billion, one hundred fifty million, two hundred twenty-one thousand, eleven".