121002011221 has 8 divisors (see below), whose sum is σ = 148925552384. Its totient is φ = 95737854960.

The previous prime is 121002011197. The next prime is 121002011237. The reversal of 121002011221 is 122110200121.

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 121002011221 - 2¹⁵ = 121001978453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002011261) 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, 664846125 + ... + 664846306.

It is an arithmetic number, because the mean of its divisors is an integer number (18615694048).

Almost surely, 2^121002011221 is an apocalyptic number.

It is an amenable number.

121002011221 is a deficient number, since it is larger than the sum of its proper divisors (27923541163).

121002011221 is a wasteful number, since it uses less digits than its factorization.

121002011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329692451.

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

Adding to 121002011221 its reverse (122110200121), we get a palindrome (243112211342).

The spelling of 121002011221 in words is "one hundred twenty-one billion, two million, eleven thousand, two hundred twenty-one".