121163541 has 4 divisors (see below), whose sum is σ = 161551392. Its totient is φ = 80775692.

The previous prime is 121163533. The next prime is 121163591. The reversal of 121163541 is 145361121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 145361121 = 3 ⋅48453707.

It is a cyclic number.

It is not a de Polignac number, because 121163541 - 2³ = 121163533 is a prime.

It is a super-3 number, since 3×121163541³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121163501) 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, 20193921 + ... + 20193926.

It is an arithmetic number, because the mean of its divisors is an integer number (40387848).

Almost surely, 2^121163541 is an apocalyptic number.

It is an amenable number.

121163541 is a deficient number, since it is larger than the sum of its proper divisors (40387851).

121163541 is an equidigital number, since it uses as much as digits as its factorization.

121163541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40387850.

The product of its digits is 720, while the sum is 24.

The square root of 121163541 is about 11007.4311717130. The cubic root of 121163541 is about 494.8314781912.

The spelling of 121163541 in words is "one hundred twenty-one million, one hundred sixty-three thousand, five hundred forty-one".