21202231302 has 120 divisors (see below), whose sum is σ = 55888046280. Its totient is φ = 5989515840.

The previous prime is 21202231279. The next prime is 21202231307. The reversal of 21202231302 is 20313220212.

It is a super-2 number, since 2×21202231302² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202231307) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 691477 + ... + 721487.

It is an arithmetic number, because the mean of its divisors is an integer number (465733719).

Almost surely, 2^21202231302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21202231302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27944023140).

21202231302 is an abundant number, since it is smaller than the sum of its proper divisors (34685814978).

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

21202231302 is a wasteful number, since it uses less digits than its factorization.

21202231302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30128 (or 30112 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21202231302 its reverse (20313220212), we get a palindrome (41515451514).

The spelling of 21202231302 in words is "twenty-one billion, two hundred two million, two hundred thirty-one thousand, three hundred two".