1131401421 has 12 divisors (see below), whose sum is σ = 1637502048. Its totient is φ = 752765064.

The previous prime is 1131401407. The next prime is 1131401477. The reversal of 1131401421 is 1241041311.

It is not a de Polignac number, because 1131401421 - 2⁹ = 1131400909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131401394 and 1131401403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131401321) 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 11 ways as a sum of consecutive naturals, for example, 120435 + ... + 129488.

It is an arithmetic number, because the mean of its divisors is an integer number (136458504).

Almost surely, 2^1131401421 is an apocalyptic number.

It is an amenable number.

1131401421 is a deficient number, since it is larger than the sum of its proper divisors (506100627).

1131401421 is a wasteful number, since it uses less digits than its factorization.

1131401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250432 (or 250429 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1131401421 is about 33636.3110492218. The cubic root of 1131401421 is about 1042.0108472413.

Adding to 1131401421 its reverse (1241041311), we get a palindrome (2372442732).

The spelling of 1131401421 in words is "one billion, one hundred thirty-one million, four hundred one thousand, four hundred twenty-one".