21311112302 has 4 divisors (see below), whose sum is σ = 31966668456. Its totient is φ = 10655556150.

The previous prime is 21311112299. The next prime is 21311112341. The reversal of 21311112302 is 20321111312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5327778074 + ... + 5327778077.

It is an arithmetic number, because the mean of its divisors is an integer number (7991667114).

Almost surely, 2^21311112302 is an apocalyptic number.

21311112302 is a deficient number, since it is larger than the sum of its proper divisors (10655556154).

21311112302 is a wasteful number, since it uses less digits than its factorization.

21311112302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655556153.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21311112302 its reverse (20321111312), we get a palindrome (41632223614).

The spelling of 21311112302 in words is "twenty-one billion, three hundred eleven million, one hundred twelve thousand, three hundred two".