121343154541 has 6 divisors (see below), whose sum is σ = 141154281870. Its totient is φ = 104008418136.

The previous prime is 121343154539. The next prime is 121343154547. The reversal of 121343154541 is 145451343121.

It can be written as a sum of positive squares in only one way, i.e., 97810060516 + 23533094025 = 312746^2 + 153405^2 .

It is not a de Polignac number, because 121343154541 - 2¹ = 121343154539 is a prime.

It is a super-2 number, since 2×121343154541² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121343154497 and 121343154506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121343154547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1238195406 + ... + 1238195503.

It is an arithmetic number, because the mean of its divisors is an integer number (23525713645).

Almost surely, 2^121343154541 is an apocalyptic number.

It is an amenable number.

121343154541 is a deficient number, since it is larger than the sum of its proper divisors (19811127329).

121343154541 is an equidigital number, since it uses as much as digits as its factorization.

121343154541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476390923 (or 2476390916 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

Adding to 121343154541 its reverse (145451343121), we get a palindrome (266794497662).

The spelling of 121343154541 in words is "one hundred twenty-one billion, three hundred forty-three million, one hundred fifty-four thousand, five hundred forty-one".