11201021331 has 4 divisors (see below), whose sum is σ = 14934695112. Its totient is φ = 7467347552.

The previous prime is 11201021327. The next prime is 11201021357. The reversal of 11201021331 is 13312010211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11201021331 - 2² = 11201021327 is a prime.

It is a super-2 number, since 2×11201021331² (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 11201021331.

It is not an unprimeable number, because it can be changed into a prime (11201021311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866836886 + ... + 1866836891.

It is an arithmetic number, because the mean of its divisors is an integer number (3733673778).

Almost surely, 2^11201021331 is an apocalyptic number.

11201021331 is a deficient number, since it is larger than the sum of its proper divisors (3733673781).

11201021331 is an equidigital number, since it uses as much as digits as its factorization.

11201021331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733673780.

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

Adding to 11201021331 its reverse (13312010211), we get a palindrome (24513031542).

The spelling of 11201021331 in words is "eleven billion, two hundred one million, twenty-one thousand, three hundred thirty-one".