202001121121121 has 4 divisors (see below), whose sum is σ = 230858424138432. Its totient is φ = 173143818103812.

The previous prime is 202001121121103. The next prime is 202001121121133. The reversal of 202001121121121 is 121121121100202.

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 a de Polignac number, because none of the positive numbers 2^k-202001121121121 is a prime.

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 202001121121121.

It is not an unprimeable number, because it can be changed into a prime (202001121120121) 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, 14428651508645 + ... + 14428651508658.

It is an arithmetic number, because the mean of its divisors is an integer number (57714606034608).

Almost surely, 2^{202001121121121} is an apocalyptic number.

It is an amenable number.

202001121121121 is a deficient number, since it is larger than the sum of its proper divisors (28857303017311).

202001121121121 is an equidigital number, since it uses as much as digits as its factorization.

202001121121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28857303017310.

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

Adding to 202001121121121 its reverse (121121121100202), we get a palindrome (323122242221323).

The spelling of 202001121121121 in words is "two hundred two trillion, one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".