11111202020121 has 16 divisors (see below), whose sum is σ = 17081190466944. Its totient is φ = 6293070169344.

The previous prime is 11111202020081. The next prime is 11111202020201. The reversal of 11111202020121 is 12102020211111.

It is a happy number.

It is not a de Polignac number, because 11111202020121 - 2¹⁰ = 11111202019097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11111202020121.

It is not an unprimeable number, because it can be changed into a prime (11111202021121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2341169566 + ... + 2341174311.

It is an arithmetic number, because the mean of its divisors is an integer number (1067574404184).

Almost surely, 2^{11111202020121} is an apocalyptic number.

It is an amenable number.

11111202020121 is a deficient number, since it is larger than the sum of its proper divisors (5969988446823).

11111202020121 is a wasteful number, since it uses less digits than its factorization.

11111202020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682344000.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11111202020121 its reverse (12102020211111), we get a palindrome (23213222231232).

The spelling of 11111202020121 in words is "eleven trillion, one hundred eleven billion, two hundred two million, twenty thousand, one hundred twenty-one".