121200221021221 has 8 divisors (see below), whose sum is σ = 126148738618080. Its totient is φ = 116302983399792.

The previous prime is 121200221021197. The next prime is 121200221021239. The reversal of 121200221021221 is 122120122002121.

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 121200221021221 - 2⁷ = 121200221021093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200221021521) 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, 12819989035 + ... + 12819998488.

It is an arithmetic number, because the mean of its divisors is an integer number (15768592327260).

Almost surely, 2^{121200221021221} is an apocalyptic number.

It is an amenable number.

121200221021221 is a deficient number, since it is larger than the sum of its proper divisors (4948517596859).

121200221021221 is a wasteful number, since it uses less digits than its factorization.

121200221021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25639987715.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121200221021221 its reverse (122120122002121), we get a palindrome (243320343023342).

The spelling of 121200221021221 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-one".