121200220987 has 2 divisors, whose sum is σ = 121200220988. Its totient is φ = 121200220986.

The previous prime is 121200220969. The next prime is 121200220993. The reversal of 121200220987 is 789022002121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121200220987 - 2⁷ = 121200220859 is a prime.

It is not a weakly prime, because it can be changed into another prime (121200227987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600110493 + 60600110494.

It is an arithmetic number, because the mean of its divisors is an integer number (60600110494).

Almost surely, 2^121200220987 is an apocalyptic number.

121200220987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121200220987 is an equidigital number, since it uses as much as digits as its factorization.

121200220987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 121200220987 in words is "one hundred twenty-one billion, two hundred million, two hundred twenty thousand, nine hundred eighty-seven".