201231211331234 has 32 divisors (see below), whose sum is σ = 360553611674880. Its totient is φ = 82357726283712.

The previous prime is 201231211331231. The next prime is 201231211331243. The reversal of 201231211331234 is 432133112132102.

It is a junction number, because it is equal to n+sod(n) for n = 201231211331197 and 201231211331206.

It is not an unprimeable number, because it can be changed into a prime (201231211331231) 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, 509542949 + ... + 509937720.

It is an arithmetic number, because the mean of its divisors is an integer number (11267300364840).

Almost surely, 2^{201231211331234} is an apocalyptic number.

201231211331234 is a deficient number, since it is larger than the sum of its proper divisors (159322400343646).

201231211331234 is a wasteful number, since it uses less digits than its factorization.

201231211331234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019481314.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 201231211331234 its reverse (432133112132102), we get a palindrome (633364323463336).

The spelling of 201231211331234 in words is "two hundred one trillion, two hundred thirty-one billion, two hundred eleven million, three hundred thirty-one thousand, two hundred thirty-four".