21361701116 has 48 divisors (see below), whose sum is σ = 43628894400. Its totient is φ = 9147962880.

The previous prime is 21361701089. The next prime is 21361701143. The reversal of 21361701116 is 61110716312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21361701089) and next prime (21361701143).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2026676 + ... + 2037188.

It is an arithmetic number, because the mean of its divisors is an integer number (908935300).

Almost surely, 2^21361701116 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 21361701116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21814447200).

21361701116 is an abundant number, since it is smaller than the sum of its proper divisors (22267193284).

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

21361701116 is a wasteful number, since it uses less digits than its factorization.

21361701116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12019 (or 12003 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 21361701116 in words is "twenty-one billion, three hundred sixty-one million, seven hundred one thousand, one hundred sixteen".