221221110100121 has 8 divisors (see below), whose sum is σ = 232999476964320. Its totient is φ = 209456258290272.

The previous prime is 221221110100079. The next prime is 221221110100301. The reversal of 221221110100121 is 121001011122122.

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 221221110100121 - 2⁶ = 221221110100057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221221110100121.

It is not an unprimeable number, because it can be changed into a prime (221221110109121) 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 7 ways as a sum of consecutive naturals, for example, 3378729980 + ... + 3378795453.

It is an arithmetic number, because the mean of its divisors is an integer number (29124934620540).

Almost surely, 2^{221221110100121} is an apocalyptic number.

It is an amenable number.

221221110100121 is a deficient number, since it is larger than the sum of its proper divisors (11778366864199).

221221110100121 is a wasteful number, since it uses less digits than its factorization.

221221110100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6757527175.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221221110100121 its reverse (121001011122122), we get a palindrome (342222121222243).

The spelling of 221221110100121 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred thousand, one hundred twenty-one".