1221013007 has 2 divisors, whose sum is σ = 1221013008. Its totient is φ = 1221013006.

The previous prime is 1221012977. The next prime is 1221013051. The reversal of 1221013007 is 7003101221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221013007 - 2⁶ = 1221012943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221013097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610506503 + 610506504.

It is an arithmetic number, because the mean of its divisors is an integer number (610506504).

Almost surely, 2^1221013007 is an apocalyptic number.

1221013007 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221013007 is an equidigital number, since it uses as much as digits as its factorization.

1221013007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 1221013007 is about 34942.9965372176. The cubic root of 1221013007 is about 1068.8253937124.

Adding to 1221013007 its reverse (7003101221), we get a palindrome (8224114228).

The spelling of 1221013007 in words is "one billion, two hundred twenty-one million, thirteen thousand, seven".