1001231131000 has 32 divisors (see below), whose sum is σ = 2342880848880. Its totient is φ = 400492452000.

The previous prime is 1001231130997. The next prime is 1001231131009. The reversal of 1001231131000 is 1311321001.

It is a super-2 number, since 2×1001231131000² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001231131009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500614566 + ... + 500616565.

Almost surely, 2^{1001231131000} is an apocalyptic number.

1001231131000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001231131000 is an abundant number, since it is smaller than the sum of its proper divisors (1341649717880).

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

1001231131000 is a wasteful number, since it uses less digits than its factorization.

1001231131000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001231152 (or 1001231138 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 1001231131000 its reverse (1311321001), we get a palindrome (1002542452001).

The spelling of 1001231131000 in words is "one trillion, one billion, two hundred thirty-one million, one hundred thirty-one thousand".