21141223404 has 96 divisors (see below), whose sum is σ = 57117312000. Its totient is φ = 5961246720.

The previous prime is 21141223393. The next prime is 21141223457. The reversal of 21141223404 is 40432214112.

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, 4475764 + ... + 4480484.

It is an arithmetic number, because the mean of its divisors is an integer number (594972000).

Almost surely, 2^21141223404 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 21141223404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28558656000).

21141223404 is an abundant number, since it is smaller than the sum of its proper divisors (35976088596).

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

21141223404 is a wasteful number, since it uses less digits than its factorization.

21141223404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423 (or 5421 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21141223404 its reverse (40432214112), we get a palindrome (61573437516).

The spelling of 21141223404 in words is "twenty-one billion, one hundred forty-one million, two hundred twenty-three thousand, four hundred four".