11011021202121 has 4 divisors (see below), whose sum is σ = 14681361602832. Its totient is φ = 7340680801412.

The previous prime is 11011021202119. The next prime is 11011021202123. The reversal of 11011021202121 is 12120212011011.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (11011021202119) and next prime (11011021202123).

It is a cyclic number.

It is not a de Polignac number, because 11011021202121 - 2¹ = 11011021202119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11011021202121.

It is not an unprimeable number, because it can be changed into a prime (11011021202123) 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 3 ways as a sum of consecutive naturals, for example, 1835170200351 + ... + 1835170200356.

It is an arithmetic number, because the mean of its divisors is an integer number (3670340400708).

Almost surely, 2^{11011021202121} is an apocalyptic number.

It is an amenable number.

11011021202121 is a deficient number, since it is larger than the sum of its proper divisors (3670340400711).

11011021202121 is an equidigital number, since it uses as much as digits as its factorization.

11011021202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670340400710.

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

Adding to 11011021202121 its reverse (12120212011011), we get a palindrome (23131233213132).

The spelling of 11011021202121 in words is "eleven trillion, eleven billion, twenty-one million, two hundred two thousand, one hundred twenty-one".