1404212021 has 2 divisors, whose sum is σ = 1404212022. Its totient is φ = 1404212020.

The previous prime is 1404212003. The next prime is 1404212057. The reversal of 1404212021 is 1202124041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869955025 + 534256996 = 29495^2 + 23114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1404212021 - 2⁶ = 1404211957 is a prime.

It is a super-2 number, since 2×1404212021² = 3943622799841808882, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1404202021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702106010 + 702106011.

It is an arithmetic number, because the mean of its divisors is an integer number (702106011).

Almost surely, 2^1404212021 is an apocalyptic number.

It is an amenable number.

1404212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1404212021 is an equidigital number, since it uses as much as digits as its factorization.

1404212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1404212021 is about 37472.8170945287. The cubic root of 1404212021 is about 1119.8097096460.

Adding to 1404212021 its reverse (1202124041), we get a palindrome (2606336062).

The spelling of 1404212021 in words is "one billion, four hundred four million, two hundred twelve thousand, twenty-one".