11211121222120 has 16 divisors (see below), whose sum is σ = 25225022749860. Its totient is φ = 4484448488832.

The previous prime is 11211121222097. The next prime is 11211121222153. The reversal of 11211121222120 is 2122212111211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10606524778756 + 604596443364 = 3256766^2 + 777558^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140139015237 + ... + 140139015316.

Almost surely, 2^{11211121222120} is an apocalyptic number.

11211121222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211121222120 is an abundant number, since it is smaller than the sum of its proper divisors (14013901527740).

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

11211121222120 is a wasteful number, since it uses less digits than its factorization.

11211121222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280278030564 (or 280278030560 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11211121222120 its reverse (2122212111211), we get a palindrome (13333333333331).

The spelling of 11211121222120 in words is "eleven trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty".