201220020011 has 4 divisors (see below), whose sum is σ = 211810547400. Its totient is φ = 190629492624.

The previous prime is 201220019951. The next prime is 201220020013. The reversal of 201220020011 is 110020022102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201220020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220019974 and 201220020001.

It is not an unprimeable number, because it can be changed into a prime (201220020013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5295263666 + ... + 5295263703.

It is an arithmetic number, because the mean of its divisors is an integer number (52952636850).

Almost surely, 2^201220020011 is an apocalyptic number.

201220020011 is a deficient number, since it is larger than the sum of its proper divisors (10590527389).

201220020011 is a wasteful number, since it uses less digits than its factorization.

201220020011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10590527388.

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

Adding to 201220020011 its reverse (110020022102), we get a palindrome (311240042113).

The spelling of 201220020011 in words is "two hundred one billion, two hundred twenty million, twenty thousand, eleven".