121540046533161 has 4 divisors (see below), whose sum is σ = 162053395377552. Its totient is φ = 81026697688772.

The previous prime is 121540046533151. The next prime is 121540046533183. The reversal of 121540046533161 is 161335640045121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121540046533161 - 2⁹ = 121540046532649 is a prime.

It is a super-2 number, since 2×121540046533161² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121540046533151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20256674422191 + ... + 20256674422196.

It is an arithmetic number, because the mean of its divisors is an integer number (40513348844388).

Almost surely, 2^{121540046533161} is an apocalyptic number.

It is an amenable number.

121540046533161 is a deficient number, since it is larger than the sum of its proper divisors (40513348844391).

121540046533161 is an equidigital number, since it uses as much as digits as its factorization.

121540046533161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40513348844390.

The product of its (nonzero) digits is 259200, while the sum is 42.

Adding to 121540046533161 its reverse (161335640045121), we get a palindrome (282875686578282).

The spelling of 121540046533161 in words is "one hundred twenty-one trillion, five hundred forty billion, forty-six million, five hundred thirty-three thousand, one hundred sixty-one".