11211211220202 has 24 divisors (see below), whose sum is σ = 27761094450336. Its totient is φ = 3203203205736.

The previous prime is 11211211220177. The next prime is 11211211220203. The reversal of 11211211220202 is 20202211211211.

11211211220202 is a `hidden beast` number, since 1 + 1 + 211 + 211 + 220 + 20 + 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 (11211211220203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44488933288 + ... + 44488933539.

It is an arithmetic number, because the mean of its divisors is an integer number (1156712268764).

Almost surely, 2^{11211211220202} is an apocalyptic number.

11211211220202 is an abundant number, since it is smaller than the sum of its proper divisors (16549883230134).

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

11211211220202 is a wasteful number, since it uses less digits than its factorization.

11211211220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88977866842 (or 88977866839 counting only the distinct ones).

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

Adding to 11211211220202 its reverse (20202211211211), we get a palindrome (31413422431413).

The spelling of 11211211220202 in words is "eleven trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty thousand, two hundred two".