1231134421 has 8 divisors (see below), whose sum is σ = 1343354688. Its totient is φ = 1118964000.

The previous prime is 1231134397. The next prime is 1231134427. The reversal of 1231134421 is 1244311321.

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

It is not a de Polignac number, because 1231134421 - 2⁷ = 1231134293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231134392 and 1231134401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231134427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55176 + ... + 74206.

It is an arithmetic number, because the mean of its divisors is an integer number (167919336).

Almost surely, 2^1231134421 is an apocalyptic number.

1231134421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1231134421 is a deficient number, since it is larger than the sum of its proper divisors (112220267).

1231134421 is a wasteful number, since it uses less digits than its factorization.

1231134421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24923.

The product of its digits is 576, while the sum is 22.

The square root of 1231134421 is about 35087.5251478357. The cubic root of 1231134421 is about 1071.7705629146.

Adding to 1231134421 its reverse (1244311321), we get a palindrome (2475445742).

Subtracting 1231134421 from its reverse (1244311321), we obtain a square (13176900 = 3630²).

The spelling of 1231134421 in words is "one billion, two hundred thirty-one million, one hundred thirty-four thousand, four hundred twenty-one".