131221030010 has 64 divisors (see below), whose sum is σ = 271705190400. Its totient is φ = 44696897280.

The previous prime is 131221030009. The next prime is 131221030027. The reversal of 131221030010 is 10030122131.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6757415 + ... + 6776805.

It is an arithmetic number, because the mean of its divisors is an integer number (4245393600).

Almost surely, 2^131221030010 is an apocalyptic number.

131221030010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131221030010 is an abundant number, since it is smaller than the sum of its proper divisors (140484160390).

131221030010 is a wasteful number, since it uses less digits than its factorization.

131221030010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20031.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 131221030010 its reverse (10030122131), we get a palindrome (141251152141).

The spelling of 131221030010 in words is "one hundred thirty-one billion, two hundred twenty-one million, thirty thousand, ten".