210001021120001 has 4 divisors (see below), whose sum is σ = 222354022362372. Its totient is φ = 197648019877632.

The previous prime is 210001021119937. The next prime is 210001021120019. The reversal of 210001021120001 is 100021120100012.

210001021120001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 99123827649025 + 110877193470976 = 9956095^2 + 10529824^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001021120001 - 2⁶ = 210001021119937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210001021120301) 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, 6176500621160 + ... + 6176500621193.

It is an arithmetic number, because the mean of its divisors is an integer number (55588505590593).

Almost surely, 2^{210001021120001} is an apocalyptic number.

It is an amenable number.

210001021120001 is a deficient number, since it is larger than the sum of its proper divisors (12353001242371).

210001021120001 is a wasteful number, since it uses less digits than its factorization.

210001021120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12353001242370.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210001021120001 its reverse (100021120100012), we get a palindrome (310022141220013).

The spelling of 210001021120001 in words is "two hundred ten trillion, one billion, twenty-one million, one hundred twenty thousand, one".