231421403211 has 4 divisors (see below), whose sum is σ = 308561870952. Its totient is φ = 154280935472.

The previous prime is 231421403209. The next prime is 231421403231. The reversal of 231421403211 is 112304124132.

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

It is a cyclic number.

It is not a de Polignac number, because 231421403211 - 2¹ = 231421403209 is a prime.

It is a super-2 number, since 2×231421403211² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231421403231) 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, 38570233866 + ... + 38570233871.

It is an arithmetic number, because the mean of its divisors is an integer number (77140467738).

Almost surely, 2^231421403211 is an apocalyptic number.

231421403211 is a deficient number, since it is larger than the sum of its proper divisors (77140467741).

231421403211 is an equidigital number, since it uses as much as digits as its factorization.

231421403211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77140467740.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 231421403211 its reverse (112304124132), we get a palindrome (343725527343).

The spelling of 231421403211 in words is "two hundred thirty-one billion, four hundred twenty-one million, four hundred three thousand, two hundred eleven".