121020221001187 has 2 divisors, whose sum is σ = 121020221001188. Its totient is φ = 121020221001186.

The previous prime is 121020221001179. The next prime is 121020221001241. The reversal of 121020221001187 is 781100122020121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121020221001187 - 2³ = 121020221001179 is a prime.

It is a super-2 number, since 2×121020221001187² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121020221001487) 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, 60510110500593 + 60510110500594.

It is an arithmetic number, because the mean of its divisors is an integer number (60510110500594).

Almost surely, 2^{121020221001187} is an apocalyptic number.

121020221001187 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020221001187 is an equidigital number, since it uses as much as digits as its factorization.

121020221001187 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 28.

The spelling of 121020221001187 in words is "one hundred twenty-one trillion, twenty billion, two hundred twenty-one million, one thousand, one hundred eighty-seven".