1211422403 has 6 divisors (see below), whose sum is σ = 1222650324. Its totient is φ = 1200296664.

The previous prime is 1211422379. The next prime is 1211422411. The reversal of 1211422403 is 3042241121.

It is not a de Polignac number, because 1211422403 - 2⁶ = 1211422339 is a prime.

It is a super-3 number, since 3×1211422403³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211422483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39101 + ... + 62862.

It is an arithmetic number, because the mean of its divisors is an integer number (203775054).

Almost surely, 2^1211422403 is an apocalyptic number.

1211422403 is a deficient number, since it is larger than the sum of its proper divisors (11227921).

1211422403 is an equidigital number, since it uses as much as digits as its factorization.

1211422403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102181 (or 102072 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1211422403 is about 34805.4938623201. The cubic root of 1211422403 is about 1066.0196258239.

Adding to 1211422403 its reverse (3042241121), we get a palindrome (4253663524).

The spelling of 1211422403 in words is "one billion, two hundred eleven million, four hundred twenty-two thousand, four hundred three".