11221222021002 has 48 divisors (see below), whose sum is σ = 27789599627712. Its totient is φ = 3205634604480.

The previous prime is 11221222021001. The next prime is 11221222021027. The reversal of 11221222021002 is 20012022212211.

It is a happy number.

11221222021002 is a `hidden beast` number, since 11 + 221 + 2 + 220 + 210 + 0 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (11221222021001) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5009628 + ... + 6894839.

It is an arithmetic number, because the mean of its divisors is an integer number (578949992244).

Almost surely, 2^{11221222021002} is an apocalyptic number.

11221222021002 is an abundant number, since it is smaller than the sum of its proper divisors (16568377606710).

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

11221222021002 is a wasteful number, since it uses less digits than its factorization.

11221222021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11911963 (or 11911960 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11221222021002 its reverse (20012022212211), we get a palindrome (31233244233213).

The spelling of 11221222021002 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, twenty-one thousand, two".