20021021212000 has 96 divisors (see below), whose sum is σ = 49348814022144. Its totient is φ = 7982822016000.

The previous prime is 20021021211991. The next prime is 20021021212069. The reversal of 20021021212000 is 21212012002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6743616 + ... + 9247615.

It is an arithmetic number, because the mean of its divisors is an integer number (514050146064).

Almost surely, 2^{20021021212000} is an apocalyptic number.

20021021212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021021212000 is an abundant number, since it is smaller than the sum of its proper divisors (29327792810144).

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

20021021212000 is a wasteful number, since it uses less digits than its factorization.

20021021212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15991569 (or 15991551 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021021212000 its reverse (21212012002), we get a palindrome (20042233224002).

The spelling of 20021021212000 in words is "twenty trillion, twenty-one billion, twenty-one million, two hundred twelve thousand".