121432543467561 has 12 divisors (see below), whose sum is σ = 175406069174388. Its totient is φ = 80953410645504.

The previous prime is 121432543467539. The next prime is 121432543467611. The reversal of 121432543467561 is 165764345234121.

121432543467561 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 3 + 2 + 543 + 46 + 7 + 56 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29741960197161 + 91690583270400 = 5453619^2 + 9575520^2 .

It is not a de Polignac number, because 121432543467561 - 2²² = 121432539273257 is a prime.

It is a super-2 number, since 2×121432543467561² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 121432543467498 and 121432543467507.

It is not an unprimeable number, because it can be changed into a prime (121432543460561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134385760 + ... + 135286353.

It is an arithmetic number, because the mean of its divisors is an integer number (14617172431199).

Almost surely, 2^{121432543467561} is an apocalyptic number.

It is an amenable number.

121432543467561 is a deficient number, since it is larger than the sum of its proper divisors (53973525706827).

121432543467561 is a wasteful number, since it uses less digits than its factorization.

121432543467561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269722152 (or 269722149 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 54.

The spelling of 121432543467561 in words is "one hundred twenty-one trillion, four hundred thirty-two billion, five hundred forty-three million, four hundred sixty-seven thousand, five hundred sixty-one".