121222221097 has 2 divisors, whose sum is σ = 121222221098. Its totient is φ = 121222221096.

The previous prime is 121222221091. The next prime is 121222221137. The reversal of 121222221097 is 790122222121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120675643456 + 546577641 = 347384^2 + 23379^2 .

It is an emirp because it is prime and its reverse (790122222121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121222221097 - 2³ = 121222221089 is a prime.

It is not a weakly prime, because it can be changed into another prime (121222221091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611110548 + 60611110549.

It is an arithmetic number, because the mean of its divisors is an integer number (60611110549).

Almost surely, 2^121222221097 is an apocalyptic number.

It is an amenable number.

121222221097 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222221097 is an equidigital number, since it uses as much as digits as its factorization.

121222221097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 121222221097 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, ninety-seven".