221000202011 has 4 divisors (see below), whose sum is σ = 234000213912. Its totient is φ = 208000190112.

The previous prime is 221000201999. The next prime is 221000202013. The reversal of 221000202011 is 110202000122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110202000122 = 2 ⋅55101000061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221000202011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000201983 and 221000202001.

It is not an unprimeable number, because it can be changed into a prime (221000202013) 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, 6500005925 + ... + 6500005958.

It is an arithmetic number, because the mean of its divisors is an integer number (58500053478).

Almost surely, 2^221000202011 is an apocalyptic number.

221000202011 is a deficient number, since it is larger than the sum of its proper divisors (13000011901).

221000202011 is a wasteful number, since it uses less digits than its factorization.

221000202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13000011900.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221000202011 its reverse (110202000122), we get a palindrome (331202202133).

The spelling of 221000202011 in words is "two hundred twenty-one billion, two hundred two thousand, eleven".