121003021221 has 8 divisors (see below), whose sum is σ = 161395680384. Its totient is φ = 80639521440.

The previous prime is 121003021213. The next prime is 121003021231. The reversal of 121003021221 is 122120300121.

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

It is not a de Polignac number, because 121003021221 - 2³ = 121003021213 is a prime.

It is a super-2 number, since 2×121003021221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121003021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121003021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7280160 + ... + 7296761.

It is an arithmetic number, because the mean of its divisors is an integer number (20174460048).

Almost surely, 2^121003021221 is an apocalyptic number.

It is an amenable number.

121003021221 is a deficient number, since it is larger than the sum of its proper divisors (40392659163).

121003021221 is a wasteful number, since it uses less digits than its factorization.

121003021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14579691.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121003021221 its reverse (122120300121), we get a palindrome (243123321342).

The spelling of 121003021221 in words is "one hundred twenty-one billion, three million, twenty-one thousand, two hundred twenty-one".