201221023020011 has 32 divisors (see below), whose sum is σ = 220171147660800. Its totient is φ = 183074738595840.

The previous prime is 201221023020007. The next prime is 201221023020049. The reversal of 201221023020011 is 110020320122102.

It is a cyclic number.

It is not a de Polignac number, because 201221023020011 - 2² = 201221023020007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221023020911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3313177001 + ... + 3313237733.

It is an arithmetic number, because the mean of its divisors is an integer number (6880348364400).

Almost surely, 2^{201221023020011} is an apocalyptic number.

201221023020011 is a deficient number, since it is larger than the sum of its proper divisors (18950124640789).

201221023020011 is a wasteful number, since it uses less digits than its factorization.

201221023020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67559.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 201221023020011 its reverse (110020320122102), we get a palindrome (311241343142113).

The spelling of 201221023020011 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-three million, twenty thousand, eleven".