11211221221002 has 48 divisors (see below), whose sum is σ = 27215446126752. Its totient is φ = 3305519768160.

The previous prime is 11211221220971. The next prime is 11211221221051. The reversal of 11211221221002 is 20012212211211.

11211221221002 is a `hidden beast` number, since 11 + 211 + 221 + 221 + 0 + 0 + 2 = 666.

11211221221002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 765159288 + ... + 765173939.

It is an arithmetic number, because the mean of its divisors is an integer number (566988460974).

Almost surely, 2^{11211221221002} is an apocalyptic number.

11211221221002 is an abundant number, since it is smaller than the sum of its proper divisors (16004224905750).

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

11211221221002 is a wasteful number, since it uses less digits than its factorization.

11211221221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530333283 (or 1530333280 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11211221221002 its reverse (20012212211211), we get a palindrome (31223433432213).

The spelling of 11211221221002 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, two".