210011311213121 has 4 divisors (see below), whose sum is σ = 229103248596144. Its totient is φ = 190919373830100.

The previous prime is 210011311213111. The next prime is 210011311213211. The reversal of 210011311213121 is 121312113110012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210011311213121 - 2¹⁴ = 210011311196737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210011311213093 and 210011311213102.

It is not an unprimeable number, because it can be changed into a prime (210011311213111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9545968691495 + ... + 9545968691516.

It is an arithmetic number, because the mean of its divisors is an integer number (57275812149036).

Almost surely, 2^{210011311213121} is an apocalyptic number.

It is an amenable number.

210011311213121 is a deficient number, since it is larger than the sum of its proper divisors (19091937383023).

210011311213121 is a wasteful number, since it uses less digits than its factorization.

210011311213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19091937383022.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 210011311213121 its reverse (121312113110012), we get a palindrome (331323424323133).

The spelling of 210011311213121 in words is "two hundred ten trillion, eleven billion, three hundred eleven million, two hundred thirteen thousand, one hundred twenty-one".