200001201121 has 4 divisors (see below), whose sum is σ = 200002287892. Its totient is φ = 200000114352.

The previous prime is 200001201091. The next prime is 200001201139. The reversal of 200001201121 is 121102100002.

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 190584633600 + 9416567521 = 436560^2 + 97039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200001201121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200001201098 and 200001201107.

It is not an unprimeable number, because it can be changed into a prime (200001201221) 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, 191286 + ... + 660751.

It is an arithmetic number, because the mean of its divisors is an integer number (50000571973).

Almost surely, 2^200001201121 is an apocalyptic number.

It is an amenable number.

200001201121 is a deficient number, since it is larger than the sum of its proper divisors (1086771).

200001201121 is an equidigital number, since it uses as much as digits as its factorization.

200001201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086770.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 200001201121 its reverse (121102100002), we get a palindrome (321103301123).

The spelling of 200001201121 in words is "two hundred billion, one million, two hundred one thousand, one hundred twenty-one".