210021101101 has 4 divisors (see below), whose sum is σ = 240024115552. Its totient is φ = 180018086652.

The previous prime is 210021101063. The next prime is 210021101107. The reversal of 210021101101 is 101101120012.

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 210021101101 - 2²³ = 210012712493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021101107) 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, 15001507215 + ... + 15001507228.

It is an arithmetic number, because the mean of its divisors is an integer number (60006028888).

Almost surely, 2^210021101101 is an apocalyptic number.

It is an amenable number.

210021101101 is a deficient number, since it is larger than the sum of its proper divisors (30003014451).

210021101101 is an equidigital number, since it uses as much as digits as its factorization.

210021101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30003014450.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 210021101101 its reverse (101101120012), we get a palindrome (311122221113).

The spelling of 210021101101 in words is "two hundred ten billion, twenty-one million, one hundred one thousand, one hundred one".