210111021010001 has 4 divisors (see below), whose sum is σ = 211271855380404. Its totient is φ = 208950186639600.

The previous prime is 210111021009913. The next prime is 210111021010043. The reversal of 210111021010001 is 100010120111012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35920543890625 + 174190477119376 = 5993375^2 + 13198124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210111021010001 is a prime.

It is a super-2 number, since 2×210111021010001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210111021010061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580417184930 + ... + 580417185291.

It is an arithmetic number, because the mean of its divisors is an integer number (52817963845101).

Almost surely, 2^{210111021010001} is an apocalyptic number.

It is an amenable number.

210111021010001 is a deficient number, since it is larger than the sum of its proper divisors (1160834370403).

210111021010001 is a wasteful number, since it uses less digits than its factorization.

210111021010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160834370402.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 210111021010001 its reverse (100010120111012), we get a palindrome (310121141121013).

The spelling of 210111021010001 in words is "two hundred ten trillion, one hundred eleven billion, twenty-one million, ten thousand, one".