121021021097 has 2 divisors, whose sum is σ = 121021021098. Its totient is φ = 121021021096.

The previous prime is 121021021087. The next prime is 121021021141. The reversal of 121021021097 is 790120120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115339027456 + 5681993641 = 339616^2 + 75379^2 .

It is an emirp because it is prime and its reverse (790120120121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121021021097 - 2¹⁰ = 121021020073 is a prime.

It is not a weakly prime, because it can be changed into another prime (121021021087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510510548 + 60510510549.

It is an arithmetic number, because the mean of its divisors is an integer number (60510510549).

Almost surely, 2^121021021097 is an apocalyptic number.

It is an amenable number.

121021021097 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021021097 is an equidigital number, since it uses as much as digits as its factorization.

121021021097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 121021021097 in words is "one hundred twenty-one billion, twenty-one million, twenty-one thousand, ninety-seven".