210021101101001 has 4 divisors (see below), whose sum is σ = 210136307411712. Its totient is φ = 209905894790292.

The previous prime is 210021101100991. The next prime is 210021101101003. The reversal of 210021101101001 is 100101101120012.

210021101101001 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, 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 210021101101001 - 2¹⁰ = 210021101099977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021101101003) 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, 57603152621 + ... + 57603156266.

It is an arithmetic number, because the mean of its divisors is an integer number (52534076852928).

Almost surely, 2^{210021101101001} is an apocalyptic number.

It is an amenable number.

210021101101001 is a deficient number, since it is larger than the sum of its proper divisors (115206310711).

210021101101001 is a wasteful number, since it uses less digits than its factorization.

210021101101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115206310710.

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

Adding to 210021101101001 its reverse (100101101120012), we get a palindrome (310122202221013).

The spelling of 210021101101001 in words is "two hundred ten trillion, twenty-one billion, one hundred one million, one hundred one thousand, one".