121620271 has 4 divisors (see below), whose sum is σ = 121714632. Its totient is φ = 121525912.

The previous prime is 121620259. The next prime is 121620281. The reversal of 121620271 is 172026121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172026121 = 7039 ⋅24439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121620271 is a prime.

It is a super-2 number, since 2×121620271² = 29582980636226882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121620281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45220 + ... + 47833.

It is an arithmetic number, because the mean of its divisors is an integer number (30428658).

Almost surely, 2^121620271 is an apocalyptic number.

121620271 is a deficient number, since it is larger than the sum of its proper divisors (94361).

121620271 is an equidigital number, since it uses as much as digits as its factorization.

121620271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94360.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 121620271 is about 11028.1580964366. The cubic root of 121620271 is about 495.4524598148.

Adding to 121620271 its reverse (172026121), we get a palindrome (293646392).

The spelling of 121620271 in words is "one hundred twenty-one million, six hundred twenty thousand, two hundred seventy-one".