200002212122221 has 6 divisors (see below), whose sum is σ = 211082667087822. Its totient is φ = 189475779904920.

The previous prime is 200002212122191. The next prime is 200002212122231. The reversal of 200002212122221 is 122221212200002.

It can be written as a sum of positive squares in only one way, i.e., 137375722706121 + 62626489416100 = 11720739^2 + 7913690^2 .

It is not a de Polignac number, because 200002212122221 - 2⁹ = 200002212121709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200002212122231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277011373770 + ... + 277011374491.

It is an arithmetic number, because the mean of its divisors is an integer number (35180444514637).

Almost surely, 2^{200002212122221} is an apocalyptic number.

It is an amenable number.

200002212122221 is a deficient number, since it is larger than the sum of its proper divisors (11080454965601).

200002212122221 is an equidigital number, since it uses as much as digits as its factorization.

200002212122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554022748299 (or 554022748280 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 200002212122221 its reverse (122221212200002), we get a palindrome (322223424322223).

The spelling of 200002212122221 in words is "two hundred trillion, two billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-one".