11221012121212 has 24 divisors (see below), whose sum is σ = 19803629790000. Its totient is φ = 5562936617856.

The previous prime is 11221012121167. The next prime is 11221012121273. The reversal of 11221012121212 is 21212121012211.

It is a happy number.

It is a super-2 number, since 2×11221012121212² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11221012121212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12624337 + ... + 13483912.

It is an arithmetic number, because the mean of its divisors is an integer number (825151241250).

Almost surely, 2^{11221012121212} is an apocalyptic number.

It is an amenable number.

11221012121212 is a deficient number, since it is larger than the sum of its proper divisors (8582617668788).

11221012121212 is a wasteful number, since it uses less digits than its factorization.

11221012121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26109165 (or 26109163 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11221012121212 its reverse (21212121012211), we get a palindrome (32433133133423).

The spelling of 11221012121212 in words is "eleven trillion, two hundred twenty-one billion, twelve million, one hundred twenty-one thousand, two hundred twelve".