11121211211021 has 8 divisors (see below), whose sum is σ = 11206758530688. Its totient is φ = 11035820430000.

The previous prime is 11121211210973. The next prime is 11121211211053. The reversal of 11121211211021 is 12011211212111.

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 11121211211021 - 2⁶ = 11121211210957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121211216021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38992025 + ... + 39276206.

It is an arithmetic number, because the mean of its divisors is an integer number (1400844816336).

Almost surely, 2^{11121211211021} is an apocalyptic number.

It is an amenable number.

11121211211021 is a deficient number, since it is larger than the sum of its proper divisors (85547319667).

11121211211021 is an equidigital number, since it uses as much as digits as its factorization.

11121211211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78269323.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11121211211021 its reverse (12011211212111), we get a palindrome (23132422423132).

The spelling of 11121211211021 in words is "eleven trillion, one hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, twenty-one".