121046021 has 4 divisors (see below), whose sum is σ = 123030444. Its totient is φ = 119061600.

The previous prime is 121045999. The next prime is 121046027. The reversal of 121046021 is 120640121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120640121 = 7 ⋅17234303.

It can be written as a sum of positive squares in 2 ways, for example, as 8473921 + 112572100 = 2911^2 + 10610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121046021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121046027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992120 + ... + 992241.

It is an arithmetic number, because the mean of its divisors is an integer number (30757611).

Almost surely, 2^121046021 is an apocalyptic number.

It is an amenable number.

121046021 is a deficient number, since it is larger than the sum of its proper divisors (1984423).

121046021 is an equidigital number, since it uses as much as digits as its factorization.

121046021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984422.

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

The square root of 121046021 is about 11002.0916647699. The cubic root of 121046021 is about 494.6714426825.

Adding to 121046021 its reverse (120640121), we get a palindrome (241686142).

The spelling of 121046021 in words is "one hundred twenty-one million, forty-six thousand, twenty-one".