11111221121202 has 48 divisors (see below), whose sum is σ = 24818981204160. Its totient is φ = 3589937175456.

The previous prime is 11111221121101. The next prime is 11111221121219. The reversal of 11111221121202 is 20212112211111.

It is a happy number.

11111221121202 is a `hidden beast` number, since 11 + 111 + 221 + 121 + 202 = 666.

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 (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31542552 + ... + 31892867.

It is an arithmetic number, because the mean of its divisors is an integer number (517062108420).

Almost surely, 2^{11111221121202} is an apocalyptic number.

11111221121202 is an abundant number, since it is smaller than the sum of its proper divisors (13707760082958).

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

11111221121202 is a wasteful number, since it uses less digits than its factorization.

11111221121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63435727 (or 63435724 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11111221121202 its reverse (20212112211111), we get a palindrome (31323333332313).

The spelling of 11111221121202 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred two".