1211420407 has 2 divisors, whose sum is σ = 1211420408. Its totient is φ = 1211420406.

The previous prime is 1211420383. The next prime is 1211420437. The reversal of 1211420407 is 7040241121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211420407 is a prime.

It is a super-3 number, since 3×1211420407³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211420437) 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, 605710203 + 605710204.

It is an arithmetic number, because the mean of its divisors is an integer number (605710204).

Almost surely, 2^1211420407 is an apocalyptic number.

1211420407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211420407 is an equidigital number, since it uses as much as digits as its factorization.

1211420407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1211420407 is about 34805.4651886740. The cubic root of 1211420407 is about 1066.0190403479.

Adding to 1211420407 its reverse (7040241121), we get a palindrome (8251661528).

The spelling of 1211420407 in words is "one billion, two hundred eleven million, four hundred twenty thousand, four hundred seven".