121027281 has 4 divisors (see below), whose sum is σ = 161369712. Its totient is φ = 80684852.

The previous prime is 121027271. The next prime is 121027297. The reversal of 121027281 is 182720121.

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: 182720121 = 3 ⋅60906707.

It is a cyclic number.

It is not a de Polignac number, because 121027281 - 2²¹ = 118930129 is a prime.

It is a super-2 number, since 2×121027281² = 29295205492505922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121027201) 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, 20171211 + ... + 20171216.

It is an arithmetic number, because the mean of its divisors is an integer number (40342428).

Almost surely, 2^121027281 is an apocalyptic number.

It is an amenable number.

121027281 is a deficient number, since it is larger than the sum of its proper divisors (40342431).

121027281 is an equidigital number, since it uses as much as digits as its factorization.

121027281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40342430.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 121027281 is about 11001.2399755664. The cubic root of 121027281 is about 494.6459134907.

The spelling of 121027281 in words is "one hundred twenty-one million, twenty-seven thousand, two hundred eighty-one".