201021221000011 has 16 divisors (see below), whose sum is σ = 222114910135104. Its totient is φ = 180958502585344.

The previous prime is 201021220999967. The next prime is 201021221000023. The reversal of 201021221000011 is 110000122120102.

It is a cyclic number.

It is not a de Polignac number, because 201021221000011 - 2¹⁷ = 201021220868939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201021220999955 and 201021221000000.

It is not an unprimeable number, because it can be changed into a prime (201021221000311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11154730 + ... + 22944943.

It is an arithmetic number, because the mean of its divisors is an integer number (13882181883444).

Almost surely, 2^{201021221000011} is an apocalyptic number.

201021221000011 is a deficient number, since it is larger than the sum of its proper divisors (21093689135093).

201021221000011 is a wasteful number, since it uses less digits than its factorization.

201021221000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34114790.

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

Adding to 201021221000011 its reverse (110000122120102), we get a palindrome (311021343120113).

The spelling of 201021221000011 in words is "two hundred one trillion, twenty-one billion, two hundred twenty-one million, eleven", and thus it is an aban number.