11211221120202 has 24 divisors (see below), whose sum is σ = 25719860217636. Its totient is φ = 3517245841536.

The previous prime is 11211221120147. The next prime is 11211221120221. The reversal of 11211221120202 is 20202112211211.

11211221120202 is a `hidden beast` number, since 1 + 121 + 1 + 221 + 120 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10269018929961 + 942202190241 = 3204531^2 + 970671^2 .

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

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 11 ways as a sum of consecutive naturals, for example, 18318988453 + ... + 18318989064.

Almost surely, 2^{11211221120202} is an apocalyptic number.

11211221120202 is an abundant number, since it is smaller than the sum of its proper divisors (14508639097434).

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

11211221120202 is a wasteful number, since it uses less digits than its factorization.

11211221120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36637977542 (or 36637977539 counting only the distinct ones).

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

Adding to 11211221120202 its reverse (20202112211211), we get a palindrome (31413333331413).

The spelling of 11211221120202 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred two".