121010121001221 has 8 divisors (see below), whose sum is σ = 161347638192000. Its totient is φ = 80673008905632.

The previous prime is 121010121001193. The next prime is 121010121001261. The reversal of 121010121001221 is 122100121010121.

It is a happy number.

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

It is not a de Polignac number, because 121010121001221 - 2²⁵ = 121010087446789 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121010121001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010121001261) 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, 100576096 + ... + 101772153.

It is an arithmetic number, because the mean of its divisors is an integer number (20168454774000).

Almost surely, 2^{121010121001221} is an apocalyptic number.

It is an amenable number.

121010121001221 is a deficient number, since it is larger than the sum of its proper divisors (40337517190779).

121010121001221 is a wasteful number, since it uses less digits than its factorization.

121010121001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202547595.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121010121001221 its reverse (122100121010121), we get a palindrome (243110242011342).

The spelling of 121010121001221 in words is "one hundred twenty-one trillion, ten billion, one hundred twenty-one million, one thousand, two hundred twenty-one".