201021211011 has 32 divisors (see below), whose sum is σ = 277063633728. Its totient is φ = 129546362880.

The previous prime is 201021210977. The next prime is 201021211033. The reversal of 201021211011 is 110112120102.

It is not a de Polignac number, because 201021211011 - 2¹¹ = 201021208963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201021211051) 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, 10844431 + ... + 10862951.

It is an arithmetic number, because the mean of its divisors is an integer number (8658238554).

Almost surely, 2^201021211011 is an apocalyptic number.

201021211011 is a deficient number, since it is larger than the sum of its proper divisors (76042422717).

201021211011 is a wasteful number, since it uses less digits than its factorization.

201021211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19191.

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

Adding to 201021211011 its reverse (110112120102), we get a palindrome (311133331113).

Subtracting from 201021211011 its reverse (110112120102), we obtain a palindrome (90909090909).

The spelling of 201021211011 in words is "two hundred one billion, twenty-one million, two hundred eleven thousand, eleven".