20213501212000 has 96 divisors (see below), whose sum is σ = 49670915636160. Its totient is φ = 8084367820800.

The previous prime is 20213501211977. The next prime is 20213501212033. The reversal of 20213501212000 is 21210531202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31389256 + ... + 32026744.

It is an arithmetic number, because the mean of its divisors is an integer number (517405371210).

Almost surely, 2^{20213501212000} is an apocalyptic number.

20213501212000 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 20213501212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24835457818080).

20213501212000 is an abundant number, since it is smaller than the sum of its proper divisors (29457414424160).

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

20213501212000 is an equidigital number, since it uses as much as digits as its factorization.

20213501212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645441 (or 645423 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20213501212000 its reverse (21210531202), we get a palindrome (20234711743202).

The spelling of 20213501212000 in words is "twenty trillion, two hundred thirteen billion, five hundred one million, two hundred twelve thousand".