11220121222212 has 24 divisors (see below), whose sum is σ = 29920323259456. Its totient is φ = 3205748920608.

The previous prime is 11220121222181. The next prime is 11220121222213. The reversal of 11220121222212 is 21222212102211.

It is a super-2 number, since 2×11220121222212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11220121222213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66786435763 + ... + 66786435930.

Almost surely, 2^{11220121222212} is an apocalyptic number.

11220121222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11220121222212 is an abundant number, since it is smaller than the sum of its proper divisors (18700202037244).

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

11220121222212 is a wasteful number, since it uses less digits than its factorization.

11220121222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133572871707 (or 133572871705 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 11220121222212 its reverse (21222212102211), we get a palindrome (32442333324423).

The spelling of 11220121222212 in words is "eleven trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".