21202231404 has 192 divisors, whose sum is σ = 55996416000. Its totient is φ = 6212194560.

The previous prime is 21202231363. The next prime is 21202231447. The reversal of 21202231404 is 40413220212.

It is a super-2 number, since 2×21202231404² (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 63 ways as a sum of consecutive naturals, for example, 25270417 + ... + 25271255.

It is an arithmetic number, because the mean of its divisors is an integer number (291648000).

Almost surely, 2^21202231404 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 21202231404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27998208000).

21202231404 is an abundant number, since it is smaller than the sum of its proper divisors (34794184596).

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

21202231404 is a wasteful number, since it uses less digits than its factorization.

21202231404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1026 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21202231404 its reverse (40413220212), we get a palindrome (61615451616).

The spelling of 21202231404 in words is "twenty-one billion, two hundred two million, two hundred thirty-one thousand, four hundred four".