200121212222211 has 16 divisors (see below), whose sum is σ = 304949288726784. Its totient is φ = 114353973552864.

The previous prime is 200121212222201. The next prime is 200121212222311. The reversal of 200121212222211 is 112222212121002.

It is not a de Polignac number, because 200121212222211 - 2³⁷ = 199983773268739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (200121212222201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39419085 + ... + 44205278.

It is an arithmetic number, because the mean of its divisors is an integer number (19059330545424).

Almost surely, 2^{200121212222211} is an apocalyptic number.

200121212222211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

200121212222211 is a deficient number, since it is larger than the sum of its proper divisors (104828076504573).

200121212222211 is a wasteful number, since it uses less digits than its factorization.

200121212222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83738330.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 200121212222211 its reverse (112222212121002), we get a palindrome (312343424343213).

The spelling of 200121212222211 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred eleven".