201021221001011 has 4 divisors (see below), whose sum is σ = 201184785868800. Its totient is φ = 200857656133224.

The previous prime is 201021221000989. The next prime is 201021221001019. The reversal of 201021221001011 is 110100122120102.

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

It is a cyclic number.

It is not a de Polignac number, because 201021221001011 - 2⁶ = 201021221000947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201021221001019) 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, 81782432051 + ... + 81782434508.

It is an arithmetic number, because the mean of its divisors is an integer number (50296196467200).

Almost surely, 2^{201021221001011} is an apocalyptic number.

201021221001011 is a deficient number, since it is larger than the sum of its proper divisors (163564867789).

201021221001011 is a wasteful number, since it uses less digits than its factorization.

201021221001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163564867788.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201021221001011 its reverse (110100122120102), we get a palindrome (311121343121113).

The spelling of 201021221001011 in words is "two hundred one trillion, twenty-one billion, two hundred twenty-one million, one thousand, eleven".