121620041 has 4 divisors (see below), whose sum is σ = 121693572. Its totient is φ = 121546512.

The previous prime is 121620029. The next prime is 121620043. The reversal of 121620041 is 140026121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57684025 + 63936016 = 7595^2 + 7996^2 .

It is a cyclic number.

It is not a de Polignac number, because 121620041 - 2⁶ = 121619977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121620043) 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, 34226 + ... + 37611.

It is an arithmetic number, because the mean of its divisors is an integer number (30423393).

Almost surely, 2^121620041 is an apocalyptic number.

It is an amenable number.

121620041 is a deficient number, since it is larger than the sum of its proper divisors (73531).

121620041 is an equidigital number, since it uses as much as digits as its factorization.

121620041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73530.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 121620041 is about 11028.1476685797. The cubic root of 121620041 is about 495.4521474926.

Adding to 121620041 its reverse (140026121), we get a palindrome (261646162).

The spelling of 121620041 in words is "one hundred twenty-one million, six hundred twenty thousand, forty-one".