1204010121 has 4 divisors (see below), whose sum is σ = 1605346832. Its totient is φ = 802673412.

The previous prime is 1204010111. The next prime is 1204010189. The reversal of 1204010121 is 1210104021.

It is a happy number.

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.

It is not a de Polignac number, because 1204010121 - 2¹¹ = 1204008073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1204010097 and 1204010106.

It is not an unprimeable number, because it can be changed into a prime (1204010111) 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, 200668351 + ... + 200668356.

It is an arithmetic number, because the mean of its divisors is an integer number (401336708).

Almost surely, 2^1204010121 is an apocalyptic number.

It is an amenable number.

1204010121 is a deficient number, since it is larger than the sum of its proper divisors (401336711).

1204010121 is an equidigital number, since it uses as much as digits as its factorization.

1204010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401336710.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1204010121 is about 34698.8489866739. The cubic root of 1204010121 is about 1063.8409723436.

Adding to 1204010121 its reverse (1210104021), we get a palindrome (2414114142).

The spelling of 1204010121 in words is "one billion, two hundred four million, ten thousand, one hundred twenty-one".