21111305302 has 8 divisors (see below), whose sum is σ = 31670529696. Its totient is φ = 10554462072.

The previous prime is 21111305291. The next prime is 21111305311. The reversal of 21111305302 is 20350311112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21111305302² (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 21111305302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572958 + ... + 608689.

It is an arithmetic number, because the mean of its divisors is an integer number (3958816212).

Almost surely, 2^21111305302 is an apocalyptic number.

21111305302 is a deficient number, since it is larger than the sum of its proper divisors (10559224394).

21111305302 is a wasteful number, since it uses less digits than its factorization.

21111305302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190582.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 21111305302 its reverse (20350311112), we get a palindrome (41461616414).

The spelling of 21111305302 in words is "twenty-one billion, one hundred eleven million, three hundred five thousand, three hundred two".