131021000 has 128 divisors (see below), whose sum is σ = 343474560. Its totient is φ = 46368000.

The previous prime is 131020997. The next prime is 131021021. The reversal of 131021000 is 120131.

It is a Harshad number since it is a multiple of its sum of digits (8).

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, 472862 + ... + 473138.

It is an arithmetic number, because the mean of its divisors is an integer number (2683395).

Almost surely, 2^131021000 is an apocalyptic number.

131021000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171737280).

131021000 is an abundant number, since it is smaller than the sum of its proper divisors (212453560).

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

131021000 is a wasteful number, since it uses less digits than its factorization.

131021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 131021000 is about 11446.4404947564. The cubic root of 131021000 is about 507.9024447385.

Adding to 131021000 its reverse (120131), we get a palindrome (131141131).

The spelling of 131021000 in words is "one hundred thirty-one million, twenty-one thousand".