1000121110221 has 8 divisors (see below), whose sum is σ = 1341479813184. Its totient is φ = 662754907040.

The previous prime is 1000121110217. The next prime is 1000121110223. The reversal of 1000121110221 is 1220111210001.

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 1000121110221 - 2² = 1000121110217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000121110197 and 1000121110206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000121110223) 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, 998124360 + ... + 998125361.

It is an arithmetic number, because the mean of its divisors is an integer number (167684976648).

Almost surely, 2^{1000121110221} is an apocalyptic number.

It is an amenable number.

1000121110221 is a deficient number, since it is larger than the sum of its proper divisors (341358702963).

1000121110221 is a wasteful number, since it uses less digits than its factorization.

1000121110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996249891.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1000121110221 its reverse (1220111210001), we get a palindrome (2220232320222).

The spelling of 1000121110221 in words is "one trillion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-one".