121012011187 has 2 divisors, whose sum is σ = 121012011188. Its totient is φ = 121012011186.

The previous prime is 121012011173. The next prime is 121012011227. The reversal of 121012011187 is 781110210121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121012011187 - 2⁷ = 121012011059 is a prime.

It is a super-2 number, since 2×121012011187² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121012021187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506005593 + 60506005594.

It is an arithmetic number, because the mean of its divisors is an integer number (60506005594).

Almost surely, 2^121012011187 is an apocalyptic number.

121012011187 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012011187 is an equidigital number, since it uses as much as digits as its factorization.

121012011187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 25.

The spelling of 121012011187 in words is "one hundred twenty-one billion, twelve million, eleven thousand, one hundred eighty-seven".