11220202120121 has 4 divisors (see below), whose sum is σ = 11228410023552. Its totient is φ = 11211994216692.

The previous prime is 11220202120109. The next prime is 11220202120139. The reversal of 11220202120121 is 12102120202211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11220202120121 - 2²⁶ = 11220135011257 is a prime.

It is a super-3 number, since 3×11220202120121³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11220202120121.

It is not an unprimeable number, because it can be changed into a prime (11220202120921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4103949665 + ... + 4103952398.

It is an arithmetic number, because the mean of its divisors is an integer number (2807102505888).

Almost surely, 2^{11220202120121} is an apocalyptic number.

It is an amenable number.

11220202120121 is a deficient number, since it is larger than the sum of its proper divisors (8207903431).

11220202120121 is an equidigital number, since it uses as much as digits as its factorization.

11220202120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8207903430.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11220202120121 its reverse (12102120202211), we get a palindrome (23322322322332).

The spelling of 11220202120121 in words is "eleven trillion, two hundred twenty billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".