231201421 has 8 divisors (see below), whose sum is σ = 252648000. Its totient is φ = 209826240.

The previous prime is 231201409. The next prime is 231201431. The reversal of 231201421 is 124102132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231201421 - 2⁹ = 231200909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231201395 and 231201404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231201431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10956 + ... + 24133.

It is an arithmetic number, because the mean of its divisors is an integer number (31581000).

Almost surely, 2^231201421 is an apocalyptic number.

It is an amenable number.

231201421 is a deficient number, since it is larger than the sum of its proper divisors (21446579).

231201421 is a wasteful number, since it uses less digits than its factorization.

231201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35699.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 231201421 is about 15205.3089741708. The cubic root of 231201421 is about 613.7575294516.

Adding to 231201421 its reverse (124102132), we get a palindrome (355303553).

The spelling of 231201421 in words is "two hundred thirty-one million, two hundred one thousand, four hundred twenty-one".