1224288467021 has 2 divisors, whose sum is σ = 1224288467022. Its totient is φ = 1224288467020.

The previous prime is 1224288467011. The next prime is 1224288467023. The reversal of 1224288467021 is 1207648824221.

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., 991637556100 + 232650910921 = 995810^2 + 482339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224288467021 - 2¹⁸ = 1224288204877 is a prime.

It is a super-2 number, since 2×1224288467021² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 1224288467023, it forms a pair of twin primes.

It is a Chen 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 (1224288467023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612144233510 + 612144233511.

It is an arithmetic number, because the mean of its divisors is an integer number (612144233511).

Almost surely, 2^{1224288467021} is an apocalyptic number.

It is an amenable number.

1224288467021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224288467021 is an equidigital number, since it uses as much as digits as its factorization.

1224288467021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 688128, while the sum is 47.

The spelling of 1224288467021 in words is "one trillion, two hundred twenty-four billion, two hundred eighty-eight million, four hundred sixty-seven thousand, twenty-one".