202101221121 has 4 divisors (see below), whose sum is σ = 269468294832. Its totient is φ = 134734147412.

The previous prime is 202101221117. The next prime is 202101221149. The reversal of 202101221121 is 121122101202.

202101221121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 202101221121 - 2² = 202101221117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202101221121.

It is not an unprimeable number, because it can be changed into a prime (202101221171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33683536851 + ... + 33683536856.

It is an arithmetic number, because the mean of its divisors is an integer number (67367073708).

Almost surely, 2^202101221121 is an apocalyptic number.

It is an amenable number.

202101221121 is a deficient number, since it is larger than the sum of its proper divisors (67367073711).

202101221121 is an equidigital number, since it uses as much as digits as its factorization.

202101221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67367073710.

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

Adding to 202101221121 its reverse (121122101202), we get a palindrome (323223322323).

The spelling of 202101221121 in words is "two hundred two billion, one hundred one million, two hundred twenty-one thousand, one hundred twenty-one".