1131010421 has 4 divisors (see below), whose sum is σ = 1132388844. Its totient is φ = 1129632000.

The previous prime is 1131010409. The next prime is 1131010427. The reversal of 1131010421 is 1240101311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1240101311 = 419 ⋅2959669.

It can be written as a sum of positive squares in 2 ways, for example, as 532963396 + 598047025 = 23086^2 + 24455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131010421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1131010396 and 1131010405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131010427) 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 in 3 ways as a sum of consecutive naturals, for example, 687980 + ... + 689621.

It is an arithmetic number, because the mean of its divisors is an integer number (283097211).

Almost surely, 2^1131010421 is an apocalyptic number.

It is an amenable number.

1131010421 is a deficient number, since it is larger than the sum of its proper divisors (1378423).

1131010421 is an equidigital number, since it uses as much as digits as its factorization.

1131010421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378422.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1131010421 is about 33630.4983757303. The cubic root of 1131010421 is about 1041.8907975469.

Adding to 1131010421 its reverse (1240101311), we get a palindrome (2371111732).

The spelling of 1131010421 in words is "one billion, one hundred thirty-one million, ten thousand, four hundred twenty-one".