21000302111113 has 16 divisors (see below), whose sum is σ = 23953931381520. Its totient is φ = 18238598332416.

The previous prime is 21000302111081. The next prime is 21000302111119. The reversal of 21000302111113 is 31111120300012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 222130288249 + 20778171822864 = 471307^2 + 4558308^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000302111113 - 2⁵ = 21000302111081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000302111119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14973208 + ... + 16315561.

It is an arithmetic number, because the mean of its divisors is an integer number (1497120711345).

Almost surely, 2^{21000302111113} is an apocalyptic number.

It is an amenable number.

21000302111113 is a deficient number, since it is larger than the sum of its proper divisors (2953629270407).

21000302111113 is a wasteful number, since it uses less digits than its factorization.

21000302111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31291836.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21000302111113 its reverse (31111120300012), we get a palindrome (52111422411125).

The spelling of 21000302111113 in words is "twenty-one trillion, three hundred two million, one hundred eleven thousand, one hundred thirteen".