1221363127 has 2 divisors, whose sum is σ = 1221363128. Its totient is φ = 1221363126.

The previous prime is 1221363053. The next prime is 1221363133. The reversal of 1221363127 is 7213631221.

It is a strong prime.

It is an emirp because it is prime and its reverse (7213631221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221363127 - 2¹¹ = 1221361079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221363095 and 1221363104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221363427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610681563 + 610681564.

It is an arithmetic number, because the mean of its divisors is an integer number (610681564).

Almost surely, 2^1221363127 is an apocalyptic number.

1221363127 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221363127 is an equidigital number, since it uses as much as digits as its factorization.

1221363127 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 1221363127 is about 34948.0060518479. The cubic root of 1221363127 is about 1068.9275442442.

Adding to 1221363127 its reverse (7213631221), we get a palindrome (8434994348).

The spelling of 1221363127 in words is "one billion, two hundred twenty-one million, three hundred sixty-three thousand, one hundred twenty-seven".