21113031302 has 12 divisors (see below), whose sum is σ = 34810328868. Its totient is φ = 9596832300.

The previous prime is 21113031281. The next prime is 21113031371. The reversal of 21113031302 is 20313031112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43621724 + ... + 43622207.

It is an arithmetic number, because the mean of its divisors is an integer number (2900860739).

Almost surely, 2^21113031302 is an apocalyptic number.

21113031302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21113031302 is a deficient number, since it is larger than the sum of its proper divisors (13697297566).

21113031302 is a wasteful number, since it uses less digits than its factorization.

21113031302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87243955 (or 87243944 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21113031302 its reverse (20313031112), we get a palindrome (41426062414).

The spelling of 21113031302 in words is "twenty-one billion, one hundred thirteen million, thirty-one thousand, three hundred two".