11201212331 has 16 divisors (see below), whose sum is σ = 11939971680. Its totient is φ = 10471472640.

The previous prime is 11201212327. The next prime is 11201212333. The reversal of 11201212331 is 13321210211.

It is not a de Polignac number, because 11201212331 - 2² = 11201212327 is a prime.

It is a super-2 number, since 2×11201212331² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11201212333) 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, 3435380 + ... + 3438638.

It is an arithmetic number, because the mean of its divisors is an integer number (746248230).

Almost surely, 2^11201212331 is an apocalyptic number.

11201212331 is a deficient number, since it is larger than the sum of its proper divisors (738759349).

11201212331 is a wasteful number, since it uses less digits than its factorization.

11201212331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11201212331 its reverse (13321210211), we get a palindrome (24522422542).

The spelling of 11201212331 in words is "eleven billion, two hundred one million, two hundred twelve thousand, three hundred thirty-one".