11201212121212 has 12 divisors (see below), whose sum is σ = 19602373883400. Its totient is φ = 5600533868816.

The previous prime is 11201212121167. The next prime is 11201212121243. The reversal of 11201212121212 is 21212121210211.

It is a happy number.

11201212121212 is a modest number, since divided by 12121212 gives 112012 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 11201212121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17698087 + ... + 18320062.

It is an arithmetic number, because the mean of its divisors is an integer number (1633531156950).

Almost surely, 2^{11201212121212} is an apocalyptic number.

It is an amenable number.

11201212121212 is a deficient number, since it is larger than the sum of its proper divisors (8401161762188).

11201212121212 is a wasteful number, since it uses less digits than its factorization.

11201212121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36095900 (or 36095898 counting only the distinct ones).

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

Adding to 11201212121212 its reverse (21212121210211), we get a palindrome (32413333331423).

The spelling of 11201212121212 in words is "eleven trillion, two hundred one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twelve".