11222220312 has 24 divisors (see below), whose sum is σ = 30393513540. Its totient is φ = 3740740080.

The previous prime is 11222220301. The next prime is 11222220323. The reversal of 11222220312 is 21302222211.

11222220312 is a `hidden beast` number, since 112 + 22 + 220 + 312 = 666.

It is an interprime number because it is at equal distance from previous prime (11222220301) and next prime (11222220323).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77932014 + ... + 77932157.

Almost surely, 2^11222220312 is an apocalyptic number.

11222220312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11222220312 is an abundant number, since it is smaller than the sum of its proper divisors (19171293228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11222220312 is a wasteful number, since it uses less digits than its factorization.

11222220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155864183 (or 155864176 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 11222220312 its reverse (21302222211), we get a palindrome (32524442523).

The spelling of 11222220312 in words is "eleven billion, two hundred twenty-two million, two hundred twenty thousand, three hundred twelve".