11221121311212 has 24 divisors (see below), whose sum is σ = 27085465234800. Its totient is φ = 3611395364416.

The previous prime is 11221121311201. The next prime is 11221121311271. The reversal of 11221121311212 is 21211312112211.

It is a super-2 number, since 2×11221121311212² (a number of 27 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16122300387 + ... + 16122301082.

It is an arithmetic number, because the mean of its divisors is an integer number (1128561051450).

Almost surely, 2^{11221121311212} is an apocalyptic number.

11221121311212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11221121311212 is an abundant number, since it is smaller than the sum of its proper divisors (15864343923588).

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

11221121311212 is a wasteful number, since it uses less digits than its factorization.

11221121311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32244601505 (or 32244601503 counting only the distinct ones).

The product of its digits is 96, while the sum is 21.

Adding to 11221121311212 its reverse (21211312112211), we get a palindrome (32432433423423).

The spelling of 11221121311212 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred eleven thousand, two hundred twelve".