210021011001105 has 16 divisors (see below), whose sum is σ = 336037363154304. Its totient is φ = 112009957349760.

The previous prime is 210021011001017. The next prime is 210021011001107. The reversal of 210021011001105 is 501100110120012.

It is not a de Polignac number, because 210021011001105 - 2¹² = 210021010997009 is a prime.

It is a super-2 number, since 2×210021011001105² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (210021011001107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76640956 + ... + 79333965.

It is an arithmetic number, because the mean of its divisors is an integer number (21002335197144).

Almost surely, 2^{210021011001105} is an apocalyptic number.

It is an amenable number.

210021011001105 is a deficient number, since it is larger than the sum of its proper divisors (126016352153199).

210021011001105 is a wasteful number, since it uses less digits than its factorization.

210021011001105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156064696.

The product of its (nonzero) digits is 20, while the sum is 15.

Adding to 210021011001105 its reverse (501100110120012), we get a palindrome (711121121121117).

The spelling of 210021011001105 in words is "two hundred ten trillion, twenty-one billion, eleven million, one thousand, one hundred five".