201021121011 has 32 divisors (see below), whose sum is σ = 278262899712. Its totient is φ = 128989175040.

The previous prime is 201021121001. The next prime is 201021121033. The reversal of 201021121011 is 110121120102.

It is not a de Polignac number, because 201021121011 - 2¹⁰ = 201021119987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201021121001) 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 31 ways as a sum of consecutive naturals, for example, 7469766 + ... + 7496628.

It is an arithmetic number, because the mean of its divisors is an integer number (8695715616).

Almost surely, 2^201021121011 is an apocalyptic number.

201021121011 is a deficient number, since it is larger than the sum of its proper divisors (77241778701).

201021121011 is a wasteful number, since it uses less digits than its factorization.

201021121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27723.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 201021121011 its reverse (110121120102), we get a palindrome (311142241113).

Subtracting from 201021121011 its reverse (110121120102), we obtain a palindrome (90900000909).

The spelling of 201021121011 in words is "two hundred one billion, twenty-one million, one hundred twenty-one thousand, eleven".