200121121201 has 4 divisors (see below), whose sum is σ = 201957094900. Its totient is φ = 198285147504.

The previous prime is 200121121181. The next prime is 200121121219. The reversal of 200121121201 is 102121121002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61305264801 + 138815856400 = 247599^2 + 372580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121121201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200121121241) 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, 917986686 + ... + 917986903.

It is an arithmetic number, because the mean of its divisors is an integer number (50489273725).

Almost surely, 2^200121121201 is an apocalyptic number.

It is an amenable number.

200121121201 is a deficient number, since it is larger than the sum of its proper divisors (1835973699).

200121121201 is a wasteful number, since it uses less digits than its factorization.

200121121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835973698.

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

Adding to 200121121201 its reverse (102121121002), we get a palindrome (302242242203).

The spelling of 200121121201 in words is "two hundred billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred one".