131121231244320 has 192 divisors, whose sum is σ = 421421537690496. Its totient is φ = 34262564044800.

The previous prime is 131121231244301. The next prime is 131121231244337. The reversal of 131121231244320 is 23442132121131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9238914 + ... + 18644033.

It is an arithmetic number, because the mean of its divisors is an integer number (2194903842138).

Almost surely, 2^{131121231244320} is an apocalyptic number.

131121231244320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131121231244320 is an abundant number, since it is smaller than the sum of its proper divisors (290300306446176).

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

131121231244320 is a wasteful number, since it uses less digits than its factorization.

131121231244320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27883163 (or 27883155 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 131121231244320 its reverse (23442132121131), we get a palindrome (154563363365451).

The spelling of 131121231244320 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, two hundred thirty-one million, two hundred forty-four thousand, three hundred twenty".