210121112110001 has 4 divisors (see below), whose sum is σ = 210187459164672. Its totient is φ = 210054765055332.

The previous prime is 210121112109967. The next prime is 210121112110031. The reversal of 210121112110001 is 100011211121012.

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 210121112110001 - 2³⁸ = 209846234203057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210121112110031) 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, 33173522585 + ... + 33173528918.

It is an arithmetic number, because the mean of its divisors is an integer number (52546864791168).

Almost surely, 2^{210121112110001} is an apocalyptic number.

It is an amenable number.

210121112110001 is a deficient number, since it is larger than the sum of its proper divisors (66347054671).

210121112110001 is an equidigital number, since it uses as much as digits as its factorization.

210121112110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66347054670.

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

Adding to 210121112110001 its reverse (100011211121012), we get a palindrome (310132323231013).

The spelling of 210121112110001 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred twelve million, one hundred ten thousand, one".