21333113130 has 128 divisors (see below), whose sum is σ = 59958632448. Its totient is φ = 4756050432.

The previous prime is 21333113117. The next prime is 21333113149. The reversal of 21333113130 is 3131133312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21333113097 and 21333113106.

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, 9326847 + ... + 9329133.

It is an arithmetic number, because the mean of its divisors is an integer number (468426816).

Almost surely, 2^21333113130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21333113130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29979316224).

21333113130 is an abundant number, since it is smaller than the sum of its proper divisors (38625519318).

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

21333113130 is a wasteful number, since it uses less digits than its factorization.

21333113130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21333113130 its reverse (3131133312), we get a palindrome (24464246442).

The spelling of 21333113130 in words is "twenty-one billion, three hundred thirty-three million, one hundred thirteen thousand, one hundred thirty".