202011201121 has 4 divisors (see below), whose sum is σ = 202012100100. Its totient is φ = 202010302144.

The previous prime is 202011201103. The next prime is 202011201131. The reversal of 202011201121 is 121102110202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 99547191121 + 102464010000 = 315511^2 + 320100^2 .

It is a cyclic number.

It is not a de Polignac number, because 202011201121 - 2¹¹ = 202011199073 is a prime.

It is a super-2 number, since 2×202011201121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202011201131) 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, 216645 + ... + 671533.

It is an arithmetic number, because the mean of its divisors is an integer number (50503025025).

Almost surely, 2^202011201121 is an apocalyptic number.

It is an amenable number.

202011201121 is a deficient number, since it is larger than the sum of its proper divisors (898979).

202011201121 is an equidigital number, since it uses as much as digits as its factorization.

202011201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898978.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202011201121 its reverse (121102110202), we get a palindrome (323113311323).

The spelling of 202011201121 in words is "two hundred two billion, eleven million, two hundred one thousand, one hundred twenty-one".