201212001002121 has 4 divisors (see below), whose sum is σ = 268282668002832. Its totient is φ = 134141334001412.

The previous prime is 201212001002083. The next prime is 201212001002149. The reversal of 201212001002121 is 121200100212102.

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 a cyclic number.

It is not a de Polignac number, because 201212001002121 - 2¹⁰ = 201212001001097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201212001002121.

It is not an unprimeable number, because it can be changed into a prime (201212001002161) 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, 33535333500351 + ... + 33535333500356.

It is an arithmetic number, because the mean of its divisors is an integer number (67070667000708).

Almost surely, 2^{201212001002121} is an apocalyptic number.

It is an amenable number.

201212001002121 is a deficient number, since it is larger than the sum of its proper divisors (67070667000711).

201212001002121 is an equidigital number, since it uses as much as digits as its factorization.

201212001002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67070667000710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201212001002121 its reverse (121200100212102), we get a palindrome (322412101214223).

The spelling of 201212001002121 in words is "two hundred one trillion, two hundred twelve billion, one million, two thousand, one hundred twenty-one".