21230231302 has 16 divisors (see below), whose sum is σ = 36447985152. Its totient is φ = 9085344840.

The previous prime is 21230231299. The next prime is 21230231357. The reversal of 21230231302 is 20313203212.

It is a super-2 number, since 2×21230231302² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21230231302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1100574 + ... + 1119697.

It is an arithmetic number, because the mean of its divisors is an integer number (2277999072).

Almost surely, 2^21230231302 is an apocalyptic number.

21230231302 is a deficient number, since it is larger than the sum of its proper divisors (15217753850).

21230231302 is a wasteful number, since it uses less digits than its factorization.

21230231302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220963.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21230231302 its reverse (20313203212), we get a palindrome (41543434514).

The spelling of 21230231302 in words is "twenty-one billion, two hundred thirty million, two hundred thirty-one thousand, three hundred two".