11131400021 has 24 divisors (see below), whose sum is σ = 13669740000. Its totient is φ = 9012868704.

The previous prime is 11131400011. The next prime is 11131400047. The reversal of 11131400021 is 12000413111.

It is a de Polignac number, because none of the positive numbers 2^k-11131400021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11131399969 and 11131400005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131400011) 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, 307790 + ... + 342048.

It is an arithmetic number, because the mean of its divisors is an integer number (569572500).

Almost surely, 2^11131400021 is an apocalyptic number.

It is an amenable number.

11131400021 is a deficient number, since it is larger than the sum of its proper divisors (2538339979).

11131400021 is a wasteful number, since it uses less digits than its factorization.

11131400021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34641 (or 34634 counting only the distinct ones).

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

Adding to 11131400021 its reverse (12000413111), we get a palindrome (23131813132).

The spelling of 11131400021 in words is "eleven billion, one hundred thirty-one million, four hundred thousand, twenty-one".