1221201407 has 2 divisors, whose sum is σ = 1221201408. Its totient is φ = 1221201406.

The previous prime is 1221201347. The next prime is 1221201413. The reversal of 1221201407 is 7041021221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221201407 - 2⁶ = 1221201343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221201427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610600703 + 610600704.

It is an arithmetic number, because the mean of its divisors is an integer number (610600704).

Almost surely, 2^1221201407 is an apocalyptic number.

1221201407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221201407 is an equidigital number, since it uses as much as digits as its factorization.

1221201407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1221201407 is about 34945.6922524079. The cubic root of 1221201407 is about 1068.8803634648.

Adding to 1221201407 its reverse (7041021221), we get a palindrome (8262222628).

The spelling of 1221201407 in words is "one billion, two hundred twenty-one million, two hundred one thousand, four hundred seven".