131221122130 has 16 divisors (see below), whose sum is σ = 269940594240. Its totient is φ = 44990098992.

The previous prime is 131221122127. The next prime is 131221122133. The reversal of 131221122130 is 31221122131.

It is an interprime number because it is at equal distance from previous prime (131221122127) and next prime (131221122133).

It is a junction number, because it is equal to n+sod(n) for n = 131221122098 and 131221122107.

It is not an unprimeable number, because it can be changed into a prime (131221122133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937293660 + ... + 937293799.

It is an arithmetic number, because the mean of its divisors is an integer number (16871287140).

Almost surely, 2^131221122130 is an apocalyptic number.

131221122130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131221122130 is an abundant number, since it is smaller than the sum of its proper divisors (138719472110).

131221122130 is a wasteful number, since it uses less digits than its factorization.

131221122130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874587473.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131221122130 its reverse (31221122131), we get a palindrome (162442244261).

Subtracting from 131221122130 its reverse (31221122131), we obtain a palindrome (99999999999).

The spelling of 131221122130 in words is "one hundred thirty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty".