121343154547 has 2 divisors, whose sum is σ = 121343154548. Its totient is φ = 121343154546.

The previous prime is 121343154539. The next prime is 121343154571. The reversal of 121343154547 is 745451343121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121343154547 - 2³ = 121343154539 is a prime.

It is a super-2 number, since 2×121343154547² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121343154587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60671577273 + 60671577274.

It is an arithmetic number, because the mean of its divisors is an integer number (60671577274).

Almost surely, 2^121343154547 is an apocalyptic number.

121343154547 is a deficient number, since it is larger than the sum of its proper divisors (1).

121343154547 is an equidigital number, since it uses as much as digits as its factorization.

121343154547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

Adding to 121343154547 its reverse (745451343121), we get a palindrome (866794497668).

The spelling of 121343154547 in words is "one hundred twenty-one billion, three hundred forty-three million, one hundred fifty-four thousand, five hundred forty-seven".