1221020122097 has 2 divisors, whose sum is σ = 1221020122098. Its totient is φ = 1221020122096.

The previous prime is 1221020122087. The next prime is 1221020122123. The reversal of 1221020122097 is 7902210201221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 880202352481 + 340817769616 = 938191^2 + 583796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221020122097 - 2⁶ = 1221020122033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221020122027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610510061048 + 610510061049.

It is an arithmetic number, because the mean of its divisors is an integer number (610510061049).

Almost surely, 2^{1221020122097} is an apocalyptic number.

It is an amenable number.

1221020122097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221020122097 is an equidigital number, since it uses as much as digits as its factorization.

1221020122097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 1221020122097 in words is "one trillion, two hundred twenty-one billion, twenty million, one hundred twenty-two thousand, ninety-seven".