121021202087 has 2 divisors, whose sum is σ = 121021202088. Its totient is φ = 121021202086.

The previous prime is 121021202059. The next prime is 121021202089. The reversal of 121021202087 is 780202120121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121021202087 - 2²⁶ = 120954093223 is a prime.

It is a super-2 number, since 2×121021202087² (a number of 23 digits) contains 22 as substring.

Together with 121021202089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121021202089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510601043 + 60510601044.

It is an arithmetic number, because the mean of its divisors is an integer number (60510601044).

Almost surely, 2^121021202087 is an apocalyptic number.

121021202087 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021202087 is an equidigital number, since it uses as much as digits as its factorization.

121021202087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

The spelling of 121021202087 in words is "one hundred twenty-one billion, twenty-one million, two hundred two thousand, eighty-seven".