21124201302 has 128 divisors (see below), whose sum is σ = 49586826240. Its totient is φ = 6658848000.

The previous prime is 21124201279. The next prime is 21124201313. The reversal of 21124201302 is 20310242112.

It is a happy number.

21124201302 is a `hidden beast` number, since 2 + 112 + 420 + 130 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 9587733 + ... + 9589935.

It is an arithmetic number, because the mean of its divisors is an integer number (387397080).

Almost surely, 2^21124201302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21124201302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24793413120).

21124201302 is an abundant number, since it is smaller than the sum of its proper divisors (28462624938).

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

21124201302 is a wasteful number, since it uses less digits than its factorization.

21124201302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387 (or 2381 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21124201302 its reverse (20310242112), we get a palindrome (41434443414).

The spelling of 21124201302 in words is "twenty-one billion, one hundred twenty-four million, two hundred one thousand, three hundred two".