11212020121 has 8 divisors (see below), whose sum is σ = 11400321024. Its totient is φ = 11025282240.

The previous prime is 11212020119. The next prime is 11212020133. The reversal of 11212020121 is 12102021211.

11212020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11212020121 - 2¹ = 11212020119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212020181) 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 7 ways as a sum of consecutive naturals, for example, 376285 + ... + 404986.

It is an arithmetic number, because the mean of its divisors is an integer number (1425040128).

Almost surely, 2^11212020121 is an apocalyptic number.

It is an amenable number.

11212020121 is a deficient number, since it is larger than the sum of its proper divisors (188300903).

11212020121 is a wasteful number, since it uses less digits than its factorization.

11212020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781511.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11212020121 its reverse (12102021211), we get a palindrome (23314041332).

The spelling of 11212020121 in words is "eleven billion, two hundred twelve million, twenty thousand, one hundred twenty-one".