121121102221221 has 8 divisors (see below), whose sum is σ = 161497508623200. Its totient is φ = 80746048650032.

The previous prime is 121121102221211. The next prime is 121121102221247. The reversal of 121121102221221 is 122122201121121.

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 121121102221221 - 2⁶ = 121121102221157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121102221211) 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, 337998771 + ... + 338356928.

It is an arithmetic number, because the mean of its divisors is an integer number (20187188577900).

Almost surely, 2^{121121102221221} is an apocalyptic number.

It is an amenable number.

121121102221221 is a deficient number, since it is larger than the sum of its proper divisors (40376406401979).

121121102221221 is an equidigital number, since it uses as much as digits as its factorization.

121121102221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676415395.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121121102221221 its reverse (122122201121121), we get a palindrome (243243303342342).

The spelling of 121121102221221 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, two hundred twenty-one".