11215101222 has 48 divisors (see below), whose sum is σ = 26176157280. Its totient is φ = 3449799936.

The previous prime is 11215101221. The next prime is 11215101223. The reversal of 11215101222 is 22210151211.

11215101222 is a `hidden beast` number, since 1 + 121 + 510 + 12 + 22 = 666.

It is an interprime number because it is at equal distance from previous prime (11215101221) and next prime (11215101223).

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

It is a junction number, because it is equal to n+sod(n) for n = 11215101195 and 11215101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11215101221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1484238 + ... + 1491774.

It is an arithmetic number, because the mean of its divisors is an integer number (545336610).

Almost surely, 2^11215101222 is an apocalyptic number.

11215101222 is an abundant number, since it is smaller than the sum of its proper divisors (14961056058).

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

11215101222 is a wasteful number, since it uses less digits than its factorization.

11215101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13917 (or 13914 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 11215101222 its reverse (22210151211), we get a palindrome (33425252433).

The spelling of 11215101222 in words is "eleven billion, two hundred fifteen million, one hundred one thousand, two hundred twenty-two".