121210154143543 has 2 divisors, whose sum is σ = 121210154143544. Its totient is φ = 121210154143542.

The previous prime is 121210154143459. The next prime is 121210154143549. The reversal of 121210154143543 is 345341451012121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121210154143543 - 2⁹ = 121210154143031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210154143549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605077071771 + 60605077071772.

It is an arithmetic number, because the mean of its divisors is an integer number (60605077071772).

Almost surely, 2^{121210154143543} is an apocalyptic number.

121210154143543 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210154143543 is an equidigital number, since it uses as much as digits as its factorization.

121210154143543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 121210154143543 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred fifty-four million, one hundred forty-three thousand, five hundred forty-three".