1231021422 has 32 divisors (see below), whose sum is σ = 2740413600. Its totient is φ = 409618944.

The previous prime is 1231021409. The next prime is 1231021453. The reversal of 1231021422 is 2241201321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1231021395 and 1231021404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11404 + ... + 50912.

It is an arithmetic number, because the mean of its divisors is an integer number (85637925).

Almost surely, 2^1231021422 is an apocalyptic number.

1231021422 is an abundant number, since it is smaller than the sum of its proper divisors (1509392178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231021422 is a wasteful number, since it uses less digits than its factorization.

1231021422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40097 (or 40091 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1231021422 is about 35085.9148662252. The cubic root of 1231021422 is about 1071.7377712862.

Adding to 1231021422 its reverse (2241201321), we get a palindrome (3472222743).

The spelling of 1231021422 in words is "one billion, two hundred thirty-one million, twenty-one thousand, four hundred twenty-two".