200121001211 has 4 divisors (see below), whose sum is σ = 203401673424. Its totient is φ = 196840329000.

The previous prime is 200121001193. The next prime is 200121001253. The reversal of 200121001211 is 112100121002.

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

It is a cyclic number.

It is not a de Polignac number, because 200121001211 - 2²² = 200116806907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121001192 and 200121001201.

It is not an unprimeable number, because it can be changed into a prime (200121003211) 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, 1640336015 + ... + 1640336136.

It is an arithmetic number, because the mean of its divisors is an integer number (50850418356).

Almost surely, 2^200121001211 is an apocalyptic number.

200121001211 is a deficient number, since it is larger than the sum of its proper divisors (3280672213).

200121001211 is an equidigital number, since it uses as much as digits as its factorization.

200121001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280672212.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 200121001211 its reverse (112100121002), we get a palindrome (312221122213).

The spelling of 200121001211 in words is "two hundred billion, one hundred twenty-one million, one thousand, two hundred eleven".