121003021 has 4 divisors (see below), whose sum is σ = 121385052. Its totient is φ = 120620992.

The previous prime is 121003019. The next prime is 121003027. The reversal of 121003021 is 120300121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120300121 = 449 ⋅267929.

It can be written as a sum of positive squares in 2 ways, for example, as 68657796 + 52345225 = 8286^2 + 7235^2 .

It is a cyclic number.

It is not a de Polignac number, because 121003021 - 2¹ = 121003019 is a prime.

It is a super-2 number, since 2×121003021² = 29283462182252882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121002989 and 121003007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121003027) 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, 190540 + ... + 191173.

It is an arithmetic number, because the mean of its divisors is an integer number (30346263).

Almost surely, 2^121003021 is an apocalyptic number.

It is an amenable number.

121003021 is a deficient number, since it is larger than the sum of its proper divisors (382031).

121003021 is an equidigital number, since it uses as much as digits as its factorization.

121003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382030.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 121003021 is about 11000.1373173247. The cubic root of 121003021 is about 494.6128605799.

Adding to 121003021 its reverse (120300121), we get a palindrome (241303142).

The spelling of 121003021 in words is "one hundred twenty-one million, three thousand, twenty-one".