11122112001221 has 16 divisors (see below), whose sum is σ = 12364635537408. Its totient is φ = 9934902979200.

The previous prime is 11122112001211. The next prime is 11122112001251. The reversal of 11122112001221 is 12210021122111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11122112001221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11122112001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122112001211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7771580 + ... + 9090746.

It is an arithmetic number, because the mean of its divisors is an integer number (772789721088).

Almost surely, 2^{11122112001221} is an apocalyptic number.

It is an amenable number.

11122112001221 is a deficient number, since it is larger than the sum of its proper divisors (1242523536187).

11122112001221 is a wasteful number, since it uses less digits than its factorization.

11122112001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340132.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11122112001221 its reverse (12210021122111), we get a palindrome (23332133123332).

The spelling of 11122112001221 in words is "eleven trillion, one hundred twenty-two billion, one hundred twelve million, one thousand, two hundred twenty-one".