231201001311 has 16 divisors (see below), whose sum is σ = 352347093504. Its totient is φ = 132099555744.

The previous prime is 231201001237. The next prime is 231201001319. The reversal of 231201001311 is 113100102132.

It is a happy number.

It is not a de Polignac number, because 231201001311 - 2¹⁰ = 231201000287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231201001319) 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, 450691 + ... + 815796.

It is an arithmetic number, because the mean of its divisors is an integer number (22021693344).

Almost surely, 2^231201001311 is an apocalyptic number.

231201001311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231201001311 is a deficient number, since it is larger than the sum of its proper divisors (121146092193).

231201001311 is a wasteful number, since it uses less digits than its factorization.

231201001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275190.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 231201001311 its reverse (113100102132), we get a palindrome (344301103443).

The spelling of 231201001311 in words is "two hundred thirty-one billion, two hundred one million, one thousand, three hundred eleven".