121022001210221 has 4 divisors (see below), whose sum is σ = 121106691205500. Its totient is φ = 120937311214944.

The previous prime is 121022001210211. The next prime is 121022001210301. The reversal of 121022001210221 is 122012100220121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68015301685321 + 53006699524900 = 8247139^2 + 7280570^2 .

It is a cyclic number.

It is not a de Polignac number, because 121022001210221 - 2¹⁴ = 121022001193837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121022001210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022001210211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42344995496 + ... + 42344998353.

It is an arithmetic number, because the mean of its divisors is an integer number (30276672801375).

Almost surely, 2^{121022001210221} is an apocalyptic number.

It is an amenable number.

121022001210221 is a deficient number, since it is larger than the sum of its proper divisors (84689995279).

121022001210221 is an equidigital number, since it uses as much as digits as its factorization.

121022001210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84689995278.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121022001210221 its reverse (122012100220121), we get a palindrome (243034101430342).

The spelling of 121022001210221 in words is "one hundred twenty-one trillion, twenty-two billion, one million, two hundred ten thousand, two hundred twenty-one".