1131511430421 has 24 divisors (see below), whose sum is σ = 1672157002880. Its totient is φ = 737114017536.

The previous prime is 1131511430411. The next prime is 1131511430461. The reversal of 1131511430421 is 1240341151311.

1131511430421 is a `hidden beast` number, since 11 + 315 + 1 + 14 + 304 + 21 = 666.

It is not a de Polignac number, because 1131511430421 - 2¹⁰ = 1131511429397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131511430411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8134315 + ... + 8272248.

Almost surely, 2^{1131511430421} is an apocalyptic number.

It is an amenable number.

1131511430421 is a deficient number, since it is larger than the sum of its proper divisors (540645572459).

1131511430421 is a wasteful number, since it uses less digits than its factorization.

1131511430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16406745 (or 16406742 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 1131511430421 its reverse (1240341151311), we get a palindrome (2371852581732).

The spelling of 1131511430421 in words is "one trillion, one hundred thirty-one billion, five hundred eleven million, four hundred thirty thousand, four hundred twenty-one".