121021202089 has 2 divisors, whose sum is σ = 121021202090. Its totient is φ = 121021202088.

The previous prime is 121021202087. The next prime is 121021202153. The reversal of 121021202089 is 980202120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116497294489 + 4523907600 = 341317^2 + 67260^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021202089 - 2¹ = 121021202087 is a prime.

It is a super-2 number, since 2×121021202089² (a number of 23 digits) contains 22 as substring.

Together with 121021202087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121021202087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510601044 + 60510601045.

It is an arithmetic number, because the mean of its divisors is an integer number (60510601045).

Almost surely, 2^121021202089 is an apocalyptic number.

It is an amenable number.

121021202089 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021202089 is an equidigital number, since it uses as much as digits as its factorization.

121021202089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 121021202089 in words is "one hundred twenty-one billion, twenty-one million, two hundred two thousand, eighty-nine".