121002321211221 has 16 divisors (see below), whose sum is σ = 162407115048320. Its totient is φ = 80132885452800.

The previous prime is 121002321211171. The next prime is 121002321211301. The reversal of 121002321211221 is 122112123200121.

It is not a de Polignac number, because 121002321211221 - 2²¹ = 121002319114069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002321211621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31816941 + ... + 35416413.

It is an arithmetic number, because the mean of its divisors is an integer number (10150444690520).

Almost surely, 2^{121002321211221} is an apocalyptic number.

It is an amenable number.

121002321211221 is a deficient number, since it is larger than the sum of its proper divisors (41404793837099).

121002321211221 is a wasteful number, since it uses less digits than its factorization.

121002321211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673836.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121002321211221 its reverse (122112123200121), we get a palindrome (243114444411342).

The spelling of 121002321211221 in words is "one hundred twenty-one trillion, two billion, three hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".