11212220331 has 60 divisors (see below), whose sum is σ = 17897759568. Its totient is φ = 6761416896.

The previous prime is 11212220317. The next prime is 11212220333. The reversal of 11212220331 is 13302221211.

11212220331 is a `hidden beast` number, since 112 + 1 + 2 + 220 + 331 = 666.

It is not a de Polignac number, because 11212220331 - 2¹⁰ = 11212219307 is a prime.

It is a super-2 number, since 2×11212220331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11212220333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 13623186 + ... + 13624008.

Almost surely, 2^11212220331 is an apocalyptic number.

11212220331 is a deficient number, since it is larger than the sum of its proper divisors (6685539237).

11212220331 is an frugal number, since it uses more digits than its factorization.

11212220331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11212220331 its reverse (13302221211), we get a palindrome (24514441542).

The spelling of 11212220331 in words is "eleven billion, two hundred twelve million, two hundred twenty thousand, three hundred thirty-one".