11421013164 has 96 divisors (see below), whose sum is σ = 31103842560. Its totient is φ = 3224966400.

The previous prime is 11421013139. The next prime is 11421013231. The reversal of 11421013164 is 46131012411.

It is a happy number.

It is a super-2 number, since 2×11421013164² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115662 + ... + 190314.

It is an arithmetic number, because the mean of its divisors is an integer number (323998360).

Almost surely, 2^11421013164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11421013164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15551921280).

11421013164 is an abundant number, since it is smaller than the sum of its proper divisors (19682829396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11421013164 is a wasteful number, since it uses less digits than its factorization.

11421013164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74751 (or 74749 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 11421013164 its reverse (46131012411), we get a palindrome (57552025575).

The spelling of 11421013164 in words is "eleven billion, four hundred twenty-one million, thirteen thousand, one hundred sixty-four".