21011020200113 has 16 divisors (see below), whose sum is σ = 22214501449920. Its totient is φ = 19817323658496.

The previous prime is 21011020200091. The next prime is 21011020200133. The reversal of 21011020200113 is 31100202011012.

It is a cyclic number.

It is not a de Polignac number, because 21011020200113 - 2⁸ = 21011020199857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011020200133) 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, 36444806 + ... + 37016832.

It is an arithmetic number, because the mean of its divisors is an integer number (1388406340620).

Almost surely, 2^{21011020200113} is an apocalyptic number.

It is an amenable number.

21011020200113 is a deficient number, since it is larger than the sum of its proper divisors (1203481249807).

21011020200113 is a wasteful number, since it uses less digits than its factorization.

21011020200113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580576.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21011020200113 its reverse (31100202011012), we get a palindrome (52111222211125).

The spelling of 21011020200113 in words is "twenty-one trillion, eleven billion, twenty million, two hundred thousand, one hundred thirteen".