221012210100121 has 8 divisors (see below), whose sum is σ = 241962251371488. Its totient is φ = 200205172524000.

The previous prime is 221012210100107. The next prime is 221012210100137. The reversal of 221012210100121 is 121001012210122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221012210100121 - 2¹⁷ = 221012209969049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221012210100095 and 221012210100104.

It is not an unprimeable number, because it can be changed into a prime (221012210100191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35750920575 + ... + 35750926756.

It is an arithmetic number, because the mean of its divisors is an integer number (30245281421436).

Almost surely, 2^{221012210100121} is an apocalyptic number.

It is an amenable number.

221012210100121 is a deficient number, since it is larger than the sum of its proper divisors (20950041271367).

221012210100121 is a wasteful number, since it uses less digits than its factorization.

221012210100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71501847623.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221012210100121 its reverse (121001012210122), we get a palindrome (342013222310243).

The spelling of 221012210100121 in words is "two hundred twenty-one trillion, twelve billion, two hundred ten million, one hundred thousand, one hundred twenty-one".