2111331004421 has 4 divisors (see below), whose sum is σ = 2120165025600. Its totient is φ = 2102496983244.

The previous prime is 2111331004411. The next prime is 2111331004441. The reversal of 2111331004421 is 1244001331112.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111331004421 is a prime.

It is a super-2 number, since 2×2111331004421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111331004411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4417010231 + ... + 4417010708.

It is an arithmetic number, because the mean of its divisors is an integer number (530041256400).

Almost surely, 2^{2111331004421} is an apocalyptic number.

It is an amenable number.

2111331004421 is a deficient number, since it is larger than the sum of its proper divisors (8834021179).

2111331004421 is an equidigital number, since it uses as much as digits as its factorization.

2111331004421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8834021178.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 2111331004421 its reverse (1244001331112), we get a palindrome (3355332335533).

The spelling of 2111331004421 in words is "two trillion, one hundred eleven billion, three hundred thirty-one million, four thousand, four hundred twenty-one".