11111001121021 has 8 divisors (see below), whose sum is σ = 11293375268000. Its totient is φ = 10928634283440.

The previous prime is 11111001120997. The next prime is 11111001121027. The reversal of 11111001121021 is 12012110011111.

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 11111001121021 - 2¹³ = 11111001112829 is a prime.

It is a super-2 number, since 2×11111001121021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111001120992 and 11111001121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111001121027) 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, 1280830 + ... + 4884928.

It is an arithmetic number, because the mean of its divisors is an integer number (1411671908500).

Almost surely, 2^{11111001121021} is an apocalyptic number.

It is an amenable number.

11111001121021 is a deficient number, since it is larger than the sum of its proper divisors (182374146979).

11111001121021 is an equidigital number, since it uses as much as digits as its factorization.

11111001121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654699.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11111001121021 its reverse (12012110011111), we get a palindrome (23123111132132).

The spelling of 11111001121021 in words is "eleven trillion, one hundred eleven billion, one million, one hundred twenty-one thousand, twenty-one".