11011202121 has 4 divisors (see below), whose sum is σ = 14681602832. Its totient is φ = 7340801412.

The previous prime is 11011202113. The next prime is 11011202129. The reversal of 11011202121 is 12120211011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12120211011 = 3 ⋅4040070337.

It is an interprime number because it is at equal distance from previous prime (11011202113) and next prime (11011202129).

It is not a de Polignac number, because 11011202121 - 2³ = 11011202113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011202097 and 11011202106.

It is not an unprimeable number, because it can be changed into a prime (11011202129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1835200351 + ... + 1835200356.

It is an arithmetic number, because the mean of its divisors is an integer number (3670400708).

Almost surely, 2^11011202121 is an apocalyptic number.

It is an amenable number.

11011202121 is a deficient number, since it is larger than the sum of its proper divisors (3670400711).

11011202121 is an equidigital number, since it uses as much as digits as its factorization.

11011202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670400710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11011202121 its reverse (12120211011), we get a palindrome (23131413132).

The spelling of 11011202121 in words is "eleven billion, eleven million, two hundred two thousand, one hundred twenty-one".