201201121021211 has 4 divisors (see below), whose sum is σ = 201201152143992. Its totient is φ = 201201089898432.

The previous prime is 201201121021169. The next prime is 201201121021259. The reversal of 201201121021211 is 112120121102102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201201121021211 is a prime.

It is a super-2 number, since 2×201201121021211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201201121021211.

It is not an unprimeable number, because it can be changed into a prime (201201121081211) 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, 1818806 + ... + 20142251.

It is an arithmetic number, because the mean of its divisors is an integer number (50300288035998).

Almost surely, 2^{201201121021211} is an apocalyptic number.

201201121021211 is a deficient number, since it is larger than the sum of its proper divisors (31122781).

201201121021211 is an equidigital number, since it uses as much as digits as its factorization.

201201121021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31122780.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201201121021211 its reverse (112120121102102), we get a palindrome (313321242123313).

The spelling of 201201121021211 in words is "two hundred one trillion, two hundred one billion, one hundred twenty-one million, twenty-one thousand, two hundred eleven".