11021201331 has 16 divisors (see below), whose sum is σ = 16802553600. Its totient is φ = 6294701088.

The previous prime is 11021201329. The next prime is 11021201333. The reversal of 11021201331 is 13310212011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11021201329) and next prime (11021201333).

It is not a de Polignac number, because 11021201331 - 2¹ = 11021201329 is a prime.

It is a super-2 number, since 2×11021201331² (a number of 21 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 11021201331.

It is not an unprimeable number, because it can be changed into a prime (11021201333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86721 + ... + 171938.

It is an arithmetic number, because the mean of its divisors is an integer number (1050159600).

Almost surely, 2^11021201331 is an apocalyptic number.

11021201331 is a deficient number, since it is larger than the sum of its proper divisors (5781352269).

11021201331 is a wasteful number, since it uses less digits than its factorization.

11021201331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260698.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11021201331 its reverse (13310212011), we get a palindrome (24331413342).

The spelling of 11021201331 in words is "eleven billion, twenty-one million, two hundred one thousand, three hundred thirty-one".