210121101101201 has 4 divisors (see below), whose sum is σ = 210121170506304. Its totient is φ = 210121031696100.

The previous prime is 210121101101161. The next prime is 210121101101221. The reversal of 210121101101201 is 102101101121012.

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-210121101101201 is a prime.

It is a super-3 number, since 3×210121101101201³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210121101101221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29943845 + ... + 36288786.

It is an arithmetic number, because the mean of its divisors is an integer number (52530292626576).

Almost surely, 2^{210121101101201} is an apocalyptic number.

It is an amenable number.

210121101101201 is a deficient number, since it is larger than the sum of its proper divisors (69405103).

210121101101201 is an equidigital number, since it uses as much as digits as its factorization.

210121101101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69405102.

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

Adding to 210121101101201 its reverse (102101101121012), we get a palindrome (312222202222213).

The spelling of 210121101101201 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred one million, one hundred one thousand, two hundred one".