11223121021021 has 8 divisors (see below), whose sum is σ = 13813072025984. Its totient is φ = 8879832016560.

The previous prime is 11223121020961. The next prime is 11223121021027. The reversal of 11223121021021 is 12012012132211.

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 11223121021021 - 2³⁹ = 10673365207133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11223121021021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11223121021027) 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, 61665500025 + ... + 61665500206.

It is an arithmetic number, because the mean of its divisors is an integer number (1726634003248).

Almost surely, 2^{11223121021021} is an apocalyptic number.

It is an amenable number.

11223121021021 is a deficient number, since it is larger than the sum of its proper divisors (2589951004963).

11223121021021 is a wasteful number, since it uses less digits than its factorization.

11223121021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123331000251.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11223121021021 its reverse (12012012132211), we get a palindrome (23235133153232).

The spelling of 11223121021021 in words is "eleven trillion, two hundred twenty-three billion, one hundred twenty-one million, twenty-one thousand, twenty-one".