201211021131 has 32 divisors (see below), whose sum is σ = 279680698368. Its totient is φ = 128528171520.

The previous prime is 201211021087. The next prime is 201211021147. The reversal of 201211021131 is 131120112102.

It is not a de Polignac number, because 201211021131 - 2¹⁴ = 201211004747 is a prime.

It is a super-2 number, since 2×201211021131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201211021131.

It is not an unprimeable number, because it can be changed into a prime (201211021331) 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, 22016995 + ... + 22026131.

It is an arithmetic number, because the mean of its divisors is an integer number (8740021824).

Almost surely, 2^201211021131 is an apocalyptic number.

201211021131 is a deficient number, since it is larger than the sum of its proper divisors (78469677237).

201211021131 is a wasteful number, since it uses less digits than its factorization.

201211021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11491.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 201211021131 its reverse (131120112102), we get a palindrome (332331133233).

The spelling of 201211021131 in words is "two hundred one billion, two hundred eleven million, twenty-one thousand, one hundred thirty-one".