131122002000 has 640 divisors, whose sum is σ = 501247918080. Its totient is φ = 29134080000.

The previous prime is 131122001999. The next prime is 131122002001. The reversal of 131122002000 is 200221131.

It is an interprime number because it is at equal distance from previous prime (131122001999) and next prime (131122002001).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122002001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 38872314 + ... + 38875686.

It is an arithmetic number, because the mean of its divisors is an integer number (783199872).

Almost surely, 2^131122002000 is an apocalyptic number.

131122002000 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 131122002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250623959040).

131122002000 is an abundant number, since it is smaller than the sum of its proper divisors (370125916080).

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

131122002000 is a wasteful number, since it uses less digits than its factorization.

131122002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460 (or 3444 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 131122002000 its reverse (200221131), we get a palindrome (131322223131).

The spelling of 131122002000 in words is "one hundred thirty-one billion, one hundred twenty-two million, two thousand".