121000120020221 has 8 divisors (see below), whose sum is σ = 132766459703640. Its totient is φ = 109585014357312.

The previous prime is 121000120020217. The next prime is 121000120020251. The reversal of 121000120020221 is 122020021000121.

It can be written as a sum of positive squares in 4 ways, for example, as 226943620996 + 120773176399225 = 476386^2 + 10989685^2 .

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

It is not a de Polignac number, because 121000120020221 - 2² = 121000120020217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121000120020196 and 121000120020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000120020211) 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, 87808504406 + ... + 87808505783.

It is an arithmetic number, because the mean of its divisors is an integer number (16595807462955).

Almost surely, 2^{121000120020221} is an apocalyptic number.

It is an amenable number.

121000120020221 is a deficient number, since it is larger than the sum of its proper divisors (11766339683419).

121000120020221 is a wasteful number, since it uses less digits than its factorization.

121000120020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175617010255.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121000120020221 its reverse (122020021000121), we get a palindrome (243020141020342).

The spelling of 121000120020221 in words is "one hundred twenty-one trillion, one hundred twenty million, twenty thousand, two hundred twenty-one".