21000313101 has 8 divisors (see below), whose sum is σ = 28067245920. Its totient is φ = 13966794512.

The previous prime is 21000313099. The next prime is 21000313121. The reversal of 21000313101 is 10131300012.

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

It is a cyclic number.

It is not a de Polignac number, because 21000313101 - 2¹ = 21000313099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000313121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8352090 + ... + 8354603.

It is an arithmetic number, because the mean of its divisors is an integer number (3508405740).

Almost surely, 2^21000313101 is an apocalyptic number.

It is an amenable number.

21000313101 is a deficient number, since it is larger than the sum of its proper divisors (7066932819).

21000313101 is a wasteful number, since it uses less digits than its factorization.

21000313101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16707115.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 21000313101 its reverse (10131300012), we get a palindrome (31131613113).

The spelling of 21000313101 in words is "twenty-one billion, three hundred thirteen thousand, one hundred one".