201231320122031 has 4 divisors (see below), whose sum is σ = 201284233962312. Its totient is φ = 201178406281752.

The previous prime is 201231320122003. The next prime is 201231320122057. The reversal of 201231320122031 is 130221023132102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201231320122031 - 2⁶ = 201231320121967 is a prime.

It is a super-2 number, since 2×201231320122031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201231320121988 and 201231320122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201231320121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26456914436 + ... + 26456922041.

It is an arithmetic number, because the mean of its divisors is an integer number (50321058490578).

Almost surely, 2^{201231320122031} is an apocalyptic number.

201231320122031 is a deficient number, since it is larger than the sum of its proper divisors (52913840281).

201231320122031 is an equidigital number, since it uses as much as digits as its factorization.

201231320122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52913840280.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 201231320122031 its reverse (130221023132102), we get a palindrome (331452343254133).

The spelling of 201231320122031 in words is "two hundred one trillion, two hundred thirty-one billion, three hundred twenty million, one hundred twenty-two thousand, thirty-one".