21111112302 has 16 divisors (see below), whose sum is σ = 48253971072. Its totient is φ = 6031746360.

The previous prime is 21111112289. The next prime is 21111112303. The reversal of 21111112302 is 20321111112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111112303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251322724 + ... + 251322807.

It is an arithmetic number, because the mean of its divisors is an integer number (3015873192).

Almost surely, 2^21111112302 is an apocalyptic number.

21111112302 is an abundant number, since it is smaller than the sum of its proper divisors (27142858770).

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

21111112302 is a wasteful number, since it uses less digits than its factorization.

21111112302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502645543.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21111112302 its reverse (20321111112), we get a palindrome (41432223414).

The spelling of 21111112302 in words is "twenty-one billion, one hundred eleven million, one hundred twelve thousand, three hundred two".