121141987 has 2 divisors, whose sum is σ = 121141988. Its totient is φ = 121141986.

The previous prime is 121141981. The next prime is 121142011. The reversal of 121141987 is 789141121.

It is a weak prime.

It is an emirp because it is prime and its reverse (789141121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121141987 - 2⁷ = 121141859 is a prime.

It is a super-3 number, since 3×121141987³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121141981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60570993 + 60570994.

It is an arithmetic number, because the mean of its divisors is an integer number (60570994).

Almost surely, 2^121141987 is an apocalyptic number.

121141987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121141987 is an equidigital number, since it uses as much as digits as its factorization.

121141987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 34.

The square root of 121141987 is about 11006.4520623133. The cubic root of 121141987 is about 494.8021342975.

The spelling of 121141987 in words is "one hundred twenty-one million, one hundred forty-one thousand, nine hundred eighty-seven".