201233123121 has 16 divisors (see below), whose sum is σ = 268608588480. Its totient is φ = 134006611200.

The previous prime is 201233123111. The next prime is 201233123131. The reversal of 201233123121 is 121321332102.

It is an interprime number because it is at equal distance from previous prime (201233123111) and next prime (201233123131).

It is not a de Polignac number, because 201233123121 - 2⁵ = 201233123089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201233123111) 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, 14885061 + ... + 14898573.

It is an arithmetic number, because the mean of its divisors is an integer number (16788036780).

Almost surely, 2^201233123121 is an apocalyptic number.

It is an amenable number.

201233123121 is a deficient number, since it is larger than the sum of its proper divisors (67375465359).

201233123121 is a wasteful number, since it uses less digits than its factorization.

201233123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18656.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 201233123121 its reverse (121321332102), we get a palindrome (322554455223).

The spelling of 201233123121 in words is "two hundred one billion, two hundred thirty-three million, one hundred twenty-three thousand, one hundred twenty-one".