21115250302 has 4 divisors (see below), whose sum is σ = 31672875456. Its totient is φ = 10557625150.

The previous prime is 21115250287. The next prime is 21115250311. The reversal of 21115250302 is 20305251112.

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

It is a super-2 number, since 2×21115250302² (a number of 21 digits) contains 22 as substring.

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, 5278812574 + ... + 5278812577.

It is an arithmetic number, because the mean of its divisors is an integer number (7918218864).

Almost surely, 2^21115250302 is an apocalyptic number.

21115250302 is a deficient number, since it is larger than the sum of its proper divisors (10557625154).

21115250302 is a wasteful number, since it uses less digits than its factorization.

21115250302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557625153.

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 21115250302 in words is "twenty-one billion, one hundred fifteen million, two hundred fifty thousand, three hundred two".