121212021097 has 2 divisors, whose sum is σ = 121212021098. Its totient is φ = 121212021096.

The previous prime is 121212021071. The next prime is 121212021163. The reversal of 121212021097 is 790120212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67839932521 + 53372088576 = 260461^2 + 231024^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212021097 - 2¹⁵ = 121211988329 is a prime.

It is not a weakly prime, because it can be changed into another prime (121212021017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606010548 + 60606010549.

It is an arithmetic number, because the mean of its divisors is an integer number (60606010549).

Almost surely, 2^121212021097 is an apocalyptic number.

It is an amenable number.

121212021097 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212021097 is an equidigital number, since it uses as much as digits as its factorization.

121212021097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The spelling of 121212021097 in words is "one hundred twenty-one billion, two hundred twelve million, twenty-one thousand, ninety-seven".