201001022110121 has 4 divisors (see below), whose sum is σ = 201065096395092. Its totient is φ = 200936947825152.

The previous prime is 201001022110081. The next prime is 201001022110127. The reversal of 201001022110121 is 121011220100102.

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 156877153053721 + 44123869056400 = 12525061^2 + 6642580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201001022110121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201001022110096 and 201001022110105.

It is not an unprimeable number, because it can be changed into a prime (201001022110127) 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, 32037137780 + ... + 32037144053.

It is an arithmetic number, because the mean of its divisors is an integer number (50266274098773).

Almost surely, 2^{201001022110121} is an apocalyptic number.

It is an amenable number.

201001022110121 is a deficient number, since it is larger than the sum of its proper divisors (64074284971).

201001022110121 is an equidigital number, since it uses as much as digits as its factorization.

201001022110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64074284970.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201001022110121 its reverse (121011220100102), we get a palindrome (322012242210223).

The spelling of 201001022110121 in words is "two hundred one trillion, one billion, twenty-two million, one hundred ten thousand, one hundred twenty-one".