20213043131200 has 84 divisors (see below), whose sum is σ = 49754224900800. Its totient is φ = 8082371530240.

The previous prime is 20213043131173. The next prime is 20213043131201. The reversal of 20213043131200 is 213134031202.

It is a super-2 number, since 2×20213043131200² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213043131201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2327001 + ... + 6770599.

It is an arithmetic number, because the mean of its divisors is an integer number (592312201200).

Almost surely, 2^{20213043131200} is an apocalyptic number.

20213043131200 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 20213043131200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24877112450400).

20213043131200 is an abundant number, since it is smaller than the sum of its proper divisors (29541181769600).

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

20213043131200 is a wasteful number, since it uses less digits than its factorization.

20213043131200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4446464 (or 4446449 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20213043131200 its reverse (213134031202), we get a palindrome (20426177162402).

The spelling of 20213043131200 in words is "twenty trillion, two hundred thirteen billion, forty-three million, one hundred thirty-one thousand, two hundred".