21112301313 has 6 divisors (see below), whose sum is σ = 30495546354. Its totient is φ = 14074867536.

The previous prime is 21112301299. The next prime is 21112301317. The reversal of 21112301313 is 31310321112.

It can be written as a sum of positive squares in only one way, i.e., 15653012544 + 5459288769 = 125112^2 + 73887^2 .

It is not a de Polignac number, because 21112301313 - 2¹⁶ = 21112235777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112301317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1172905620 + ... + 1172905637.

It is an arithmetic number, because the mean of its divisors is an integer number (5082591059).

Almost surely, 2^21112301313 is an apocalyptic number.

It is an amenable number.

21112301313 is a deficient number, since it is larger than the sum of its proper divisors (9383245041).

21112301313 is a wasteful number, since it uses less digits than its factorization.

21112301313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345811263 (or 2345811260 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21112301313 its reverse (31310321112), we get a palindrome (52422622425).

The spelling of 21112301313 in words is "twenty-one billion, one hundred twelve million, three hundred one thousand, three hundred thirteen".