210201110111021 has 4 divisors (see below), whose sum is σ = 210201156461472. Its totient is φ = 210201063760572.

The previous prime is 210201110111009. The next prime is 210201110111029. The reversal of 210201110111021 is 120111011102012.

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 a de Polignac number, because none of the positive numbers 2^k-210201110111021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210201110110987 and 210201110111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210201110111029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15532535 + ... + 25722788.

It is an arithmetic number, because the mean of its divisors is an integer number (52550289115368).

Almost surely, 2^{210201110111021} is an apocalyptic number.

It is an amenable number.

210201110111021 is a deficient number, since it is larger than the sum of its proper divisors (46350451).

210201110111021 is an equidigital number, since it uses as much as digits as its factorization.

210201110111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46350450.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 210201110111021 its reverse (120111011102012), we get a palindrome (330312121213033).

Subtracting from 210201110111021 its reverse (120111011102012), we obtain a palindrome (90090099009009).

The spelling of 210201110111021 in words is "two hundred ten trillion, two hundred one billion, one hundred ten million, one hundred eleven thousand, twenty-one".