1214121421 has 2 divisors, whose sum is σ = 1214121422. Its totient is φ = 1214121420.

The previous prime is 1214121361. The next prime is 1214121457. The reversal of 1214121421 is 1241214121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1002418921 + 211702500 = 31661^2 + 14550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214121421 - 2¹⁵ = 1214088653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214121121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607060710 + 607060711.

It is an arithmetic number, because the mean of its divisors is an integer number (607060711).

Almost surely, 2^1214121421 is an apocalyptic number.

It is an amenable number.

1214121421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214121421 is an equidigital number, since it uses as much as digits as its factorization.

1214121421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 19.

The square root of 1214121421 is about 34844.2451632978. The cubic root of 1214121421 is about 1066.8107267126.

Adding to 1214121421 its reverse (1241214121), we get a palindrome (2455335542).

The spelling of 1214121421 in words is "one billion, two hundred fourteen million, one hundred twenty-one thousand, four hundred twenty-one".