1214648021 has 2 divisors, whose sum is σ = 1214648022. Its totient is φ = 1214648020.

The previous prime is 1214648003. The next prime is 1214648023. The reversal of 1214648021 is 1208464121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777628996 + 437019025 = 27886^2 + 20905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214648021 - 2⁶ = 1214647957 is a prime.

Together with 1214648023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214648023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607324010 + 607324011.

It is an arithmetic number, because the mean of its divisors is an integer number (607324011).

Almost surely, 2^1214648021 is an apocalyptic number.

It is an amenable number.

1214648021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214648021 is an equidigital number, since it uses as much as digits as its factorization.

1214648021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1214648021 is about 34851.8008286516. The cubic root of 1214648021 is about 1066.9649400991.

The spelling of 1214648021 in words is "one billion, two hundred fourteen million, six hundred forty-eight thousand, twenty-one".