20212121212000 has 96 divisors (see below), whose sum is σ = 50152877689824. Its totient is φ = 8004800320000.

The previous prime is 20212121211983. The next prime is 20212121212039. The reversal of 20212121212000 is 21212121202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24611002 + ... + 25419001.

It is an arithmetic number, because the mean of its divisors is an integer number (522425809269).

Almost surely, 2^{20212121212000} is an apocalyptic number.

20212121212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212121212000 is an abundant number, since it is smaller than the sum of its proper divisors (29940756477824).

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

20212121212000 is a wasteful number, since it uses less digits than its factorization.

20212121212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50030129 (or 50030111 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20212121212000 its reverse (21212121202), we get a palindrome (20233333333202).

The spelling of 20212121212000 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand".