11201221111212 has 96 divisors (see below), whose sum is σ = 31844368200960. Its totient is φ = 3376722263040.

The previous prime is 11201221111207. The next prime is 11201221111291. The reversal of 11201221111212 is 21211112210211.

It is a happy number.

11201221111212 is a `hidden beast` number, since 1 + 120 + 1 + 221 + 111 + 212 = 666.

It is a super-2 number, since 2×11201221111212² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24197238 + ... + 24655805.

It is an arithmetic number, because the mean of its divisors is an integer number (331712168760).

Almost surely, 2^{11201221111212} is an apocalyptic number.

11201221111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11201221111212 is an abundant number, since it is smaller than the sum of its proper divisors (20643147089748).

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

11201221111212 is a wasteful number, since it uses less digits than its factorization.

11201221111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48853260 (or 48853252 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11201221111212 its reverse (21211112210211), we get a palindrome (32412333321423).

The spelling of 11201221111212 in words is "eleven trillion, two hundred one billion, two hundred twenty-one million, one hundred eleven thousand, two hundred twelve".