121122122202221 has 8 divisors (see below), whose sum is σ = 145710823702080. Its totient is φ = 98354805998688.

The previous prime is 121122122202089. The next prime is 121122122202223. The reversal of 121122122202221 is 122202221221121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121122122202221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122122202223) 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, 455346323936 + ... + 455346324201.

It is an arithmetic number, because the mean of its divisors is an integer number (18213852962760).

Almost surely, 2^{121122122202221} is an apocalyptic number.

It is an amenable number.

121122122202221 is a deficient number, since it is larger than the sum of its proper divisors (24588701499859).

121122122202221 is an equidigital number, since it uses as much as digits as its factorization.

121122122202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910692648163.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 121122122202221 its reverse (122202221221121), we get a palindrome (243324343423342).

The spelling of 121122122202221 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-one".