2131220101000 has 128 divisors (see below), whose sum is σ = 5254843651200. Its totient is φ = 806803027200.

The previous prime is 2131220100949. The next prime is 2131220101001. The reversal of 2131220101000 is 1010221312.

It is not an unprimeable number, because it can be changed into a prime (2131220101001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18886747 + ... + 18999253.

It is an arithmetic number, because the mean of its divisors is an integer number (41053466025).

Almost surely, 2^{2131220101000} is an apocalyptic number.

2131220101000 is a gapful number since it is divisible by the number (20) 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 2131220101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2627421825600).

2131220101000 is an abundant number, since it is smaller than the sum of its proper divisors (3123623550200).

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

2131220101000 is a wasteful number, since it uses less digits than its factorization.

2131220101000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113544 (or 113530 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2131220101000 its reverse (1010221312), we get a palindrome (2132230322312).

The spelling of 2131220101000 in words is "two trillion, one hundred thirty-one billion, two hundred twenty million, one hundred one thousand".