201211021011 has 128 divisors (see below), whose sum is σ = 371130826752. Its totient is φ = 93576384000.

The previous prime is 201211020979. The next prime is 201211021087. The reversal of 201211021011 is 110120112102.

It is not a de Polignac number, because 201211021011 - 2⁵ = 201211020979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201211021211) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 36775006 + ... + 36780476.

It is an arithmetic number, because the mean of its divisors is an integer number (2899459584).

Almost surely, 2^201211021011 is an apocalyptic number.

201211021011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

201211021011 is a deficient number, since it is larger than the sum of its proper divisors (169919805741).

201211021011 is a wasteful number, since it uses less digits than its factorization.

201211021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5873.

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

Adding to 201211021011 its reverse (110120112102), we get a palindrome (311331133113).

The spelling of 201211021011 in words is "two hundred one billion, two hundred eleven million, twenty-one thousand, eleven".