201231100001223 has 32 divisors (see below), whose sum is σ = 298869742365120. Its totient is φ = 133816763059200.

The previous prime is 201231100001149. The next prime is 201231100001227. The reversal of 201231100001223 is 322100001132102.

201231100001223 is a `hidden beast` number, since 201 + 231 + 10 + 0 + 0 + 0 + 1 + 223 = 666.

It is not a de Polignac number, because 201231100001223 - 2¹⁰ = 201231100000199 is a prime.

It is a super-2 number, since 2×201231100001223² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201231100001196 and 201231100001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201231100001227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 618026461 + ... + 618351977.

It is an arithmetic number, because the mean of its divisors is an integer number (9339679448910).

Almost surely, 2^{201231100001223} is an apocalyptic number.

201231100001223 is a deficient number, since it is larger than the sum of its proper divisors (97638642363897).

201231100001223 is a wasteful number, since it uses less digits than its factorization.

201231100001223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383024 (or 383018 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201231100001223 its reverse (322100001132102), we get a palindrome (523331101133325).

The spelling of 201231100001223 in words is "two hundred one trillion, two hundred thirty-one billion, one hundred million, one thousand, two hundred twenty-three".