1131423212520 has 96 divisors (see below), whose sum is σ = 3694552823520. Its totient is φ = 300282917760.

The previous prime is 1131423212477. The next prime is 1131423212581. The reversal of 1131423212520 is 252123241311.

It is a happy number.

1131423212520 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 423 + 212 + 5 + 20 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7371534 + ... + 7523453.

It is an arithmetic number, because the mean of its divisors is an integer number (38484925245).

Almost surely, 2^{1131423212520} is an apocalyptic number.

1131423212520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131423212520 is an abundant number, since it is smaller than the sum of its proper divisors (2563129611000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131423212520 is a wasteful number, since it uses less digits than its factorization.

1131423212520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14895215 (or 14895208 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1131423212520 its reverse (252123241311), we get a palindrome (1383546453831).

The spelling of 1131423212520 in words is "one trillion, one hundred thirty-one billion, four hundred twenty-three million, two hundred twelve thousand, five hundred twenty".