131221131130 has 8 divisors (see below), whose sum is σ = 236198036052. Its totient is φ = 52488452448.

The previous prime is 131221131091. The next prime is 131221131149. The reversal of 131221131130 is 31131122131.

It can be written as a sum of positive squares in 2 ways, for example, as 128326583529 + 2894547601 = 358227^2 + 53801^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 131221131098 and 131221131107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6561056547 + ... + 6561056566.

Almost surely, 2^131221131130 is an apocalyptic number.

131221131130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131221131130 is a deficient number, since it is larger than the sum of its proper divisors (104976904922).

131221131130 is a wasteful number, since it uses less digits than its factorization.

131221131130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13122113120.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 131221131130 its reverse (31131122131), we get a palindrome (162352253261).

The spelling of 131221131130 in words is "one hundred thirty-one billion, two hundred twenty-one million, one hundred thirty-one thousand, one hundred thirty".