121492281 has 16 divisors (see below), whose sum is σ = 168226560. Its totient is φ = 77898240.

The previous prime is 121492253. The next prime is 121492291. The reversal of 121492281 is 182294121.

It is a happy number.

It is not a de Polignac number, because 121492281 - 2⁵ = 121492249 is a prime.

It is a super-2 number, since 2×121492281² = 29520748685165922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121492211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21001 + ... + 26153.

It is an arithmetic number, because the mean of its divisors is an integer number (10514160).

Almost surely, 2^121492281 is an apocalyptic number.

It is an amenable number.

121492281 is a deficient number, since it is larger than the sum of its proper divisors (46734279).

121492281 is a wasteful number, since it uses less digits than its factorization.

121492281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456.

The product of its digits is 2304, while the sum is 30.

The square root of 121492281 is about 11022.3536960125. The cubic root of 121492281 is about 495.2785983975.

The spelling of 121492281 in words is "one hundred twenty-one million, four hundred ninety-two thousand, two hundred eighty-one".