21113231302 has 16 divisors (see below), whose sum is σ = 32568512400. Its totient is φ = 10261081600.

The previous prime is 21113231273. The next prime is 21113231341. The reversal of 21113231302 is 20313231112.

It is a self number, because there is not a number n which added to its sum of digits gives 21113231302.

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, 994699 + ... + 1015702.

It is an arithmetic number, because the mean of its divisors is an integer number (2035532025).

Almost surely, 2^21113231302 is an apocalyptic number.

21113231302 is a deficient number, since it is larger than the sum of its proper divisors (11455281098).

21113231302 is a wasteful number, since it uses less digits than its factorization.

21113231302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010551.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21113231302 its reverse (20313231112), we get a palindrome (41426462414).

The spelling of 21113231302 in words is "twenty-one billion, one hundred thirteen million, two hundred thirty-one thousand, three hundred two".