200111221021 has 4 divisors (see below), whose sum is σ = 201454249500. Its totient is φ = 198768192544.

The previous prime is 200111220997. The next prime is 200111221027. The reversal of 200111221021 is 120122111002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120122111002 = 2 ⋅60061055501.

It can be written as a sum of positive squares in 2 ways, for example, as 16360968100 + 183750252921 = 127910^2 + 428661^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111221021 - 2¹¹ = 200111218973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200111220992 and 200111221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111221027) 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, 671514016 + ... + 671514313.

It is an arithmetic number, because the mean of its divisors is an integer number (50363562375).

Almost surely, 2^200111221021 is an apocalyptic number.

It is an amenable number.

200111221021 is a deficient number, since it is larger than the sum of its proper divisors (1343028479).

200111221021 is a wasteful number, since it uses less digits than its factorization.

200111221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343028478.

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

Adding to 200111221021 its reverse (120122111002), we get a palindrome (320233332023).

The spelling of 200111221021 in words is "two hundred billion, one hundred eleven million, two hundred twenty-one thousand, twenty-one".