201312232401 has 16 divisors (see below), whose sum is σ = 306946680704. Its totient is φ = 114966117504.

The previous prime is 201312232399. The next prime is 201312232417. The reversal of 201312232401 is 104232213102.

It is not a de Polignac number, because 201312232401 - 2¹ = 201312232399 is a prime.

It is a super-2 number, since 2×201312232401² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201312232421) 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, 2857870 + ... + 2927463.

It is an arithmetic number, because the mean of its divisors is an integer number (19184167544).

Almost surely, 2^201312232401 is an apocalyptic number.

201312232401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201312232401 is a deficient number, since it is larger than the sum of its proper divisors (105634448303).

201312232401 is a wasteful number, since it uses less digits than its factorization.

201312232401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5787000.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 201312232401 its reverse (104232213102), we get a palindrome (305544445503).

The spelling of 201312232401 in words is "two hundred one billion, three hundred twelve million, two hundred thirty-two thousand, four hundred one".