202020001121 has 4 divisors (see below), whose sum is σ = 202021023744. Its totient is φ = 202018978500.

The previous prime is 202020001093. The next prime is 202020001133. The reversal of 202020001121 is 121100020202.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202020001121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202020001171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109985 + ... + 645086.

It is an arithmetic number, because the mean of its divisors is an integer number (50505255936).

Almost surely, 2^202020001121 is an apocalyptic number.

It is an amenable number.

202020001121 is a deficient number, since it is larger than the sum of its proper divisors (1022623).

202020001121 is an equidigital number, since it uses as much as digits as its factorization.

202020001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022622.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 202020001121 its reverse (121100020202), we get a palindrome (323120021323).

The spelling of 202020001121 in words is "two hundred two billion, twenty million, one thousand, one hundred twenty-one".