201001232123121 has 4 divisors (see below), whose sum is σ = 268001642830832. Its totient is φ = 134000821415412.

The previous prime is 201001232123089. The next prime is 201001232123137. The reversal of 201001232123121 is 121321232100102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 201001232123121 - 2⁵ = 201001232123089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201001232123161) 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, 33500205353851 + ... + 33500205353856.

It is an arithmetic number, because the mean of its divisors is an integer number (67000410707708).

Almost surely, 2^{201001232123121} is an apocalyptic number.

It is an amenable number.

201001232123121 is a deficient number, since it is larger than the sum of its proper divisors (67000410707711).

201001232123121 is an equidigital number, since it uses as much as digits as its factorization.

201001232123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67000410707710.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 201001232123121 its reverse (121321232100102), we get a palindrome (322322464223223).

The spelling of 201001232123121 in words is "two hundred one trillion, one billion, two hundred thirty-two million, one hundred twenty-three thousand, one hundred twenty-one".