1231211422 has 8 divisors (see below), whose sum is σ = 2110648176. Its totient is φ = 527662032.

The previous prime is 1231211411. The next prime is 1231211467. The reversal of 1231211422 is 2241121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1231211422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43971823 + ... + 43971850.

It is an arithmetic number, because the mean of its divisors is an integer number (263831022).

Almost surely, 2^1231211422 is an apocalyptic number.

1231211422 is a deficient number, since it is larger than the sum of its proper divisors (879436754).

1231211422 is an equidigital number, since it uses as much as digits as its factorization.

1231211422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87943682.

The product of its digits is 192, while the sum is 19.

The square root of 1231211422 is about 35088.6224010006. The cubic root of 1231211422 is about 1071.7929069910.

Adding to 1231211422 its reverse (2241121321), we get a palindrome (3472332743).

The spelling of 1231211422 in words is "one billion, two hundred thirty-one million, two hundred eleven thousand, four hundred twenty-two".