201231002122133 has 4 divisors (see below), whose sum is σ = 208170002195340. Its totient is φ = 194292002048928.

The previous prime is 201231002121949. The next prime is 201231002122141. The reversal of 201231002122133 is 331221200132102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 87496605097444 + 113734397024689 = 9353962^2 + 10664633^2 .

It is a cyclic number.

It is not a de Polignac number, because 201231002122133 - 2¹⁸ = 201231001859989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201231002122099 and 201231002122108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201231002722133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3469500036560 + ... + 3469500036617.

It is an arithmetic number, because the mean of its divisors is an integer number (52042500548835).

Almost surely, 2^{201231002122133} is an apocalyptic number.

It is an amenable number.

201231002122133 is a deficient number, since it is larger than the sum of its proper divisors (6939000073207).

201231002122133 is an equidigital number, since it uses as much as digits as its factorization.

201231002122133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6939000073206.

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

Adding to 201231002122133 its reverse (331221200132102), we get a palindrome (532452202254235).

The spelling of 201231002122133 in words is "two hundred one trillion, two hundred thirty-one billion, two million, one hundred twenty-two thousand, one hundred thirty-three".