121000100120221 has 16 divisors (see below), whose sum is σ = 138471986126848. Its totient is φ = 103574757510000.

The previous prime is 121000100120213. The next prime is 121000100120243. The reversal of 121000100120221 is 122021001000121.

It is not a de Polignac number, because 121000100120221 - 2³ = 121000100120213 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 (121000100120321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503453146 + ... + 503693428.

It is an arithmetic number, because the mean of its divisors is an integer number (8654499132928).

Almost surely, 2^{121000100120221} is an apocalyptic number.

It is an amenable number.

121000100120221 is a deficient number, since it is larger than the sum of its proper divisors (17471886006627).

121000100120221 is an equidigital number, since it uses as much as digits as its factorization.

121000100120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336832.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121000100120221 its reverse (122021001000121), we get a palindrome (243021101120342).

The spelling of 121000100120221 in words is "one hundred twenty-one trillion, one hundred million, one hundred twenty thousand, two hundred twenty-one".