20021212001000 has 512 divisors, whose sum is σ = 57839626091520. Its totient is φ = 6330175488000.

The previous prime is 20021212000987. The next prime is 20021212001069. The reversal of 20021212001000 is 10021212002.

It is a happy number.

20021212001000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6010569335 + ... + 6010572665.

It is an arithmetic number, because the mean of its divisors is an integer number (112968019710).

Almost surely, 2^{20021212001000} is an apocalyptic number.

20021212001000 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 20021212001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28919813045760).

20021212001000 is an abundant number, since it is smaller than the sum of its proper divisors (37818414090520).

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

20021212001000 is a wasteful number, since it uses less digits than its factorization.

20021212001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382 (or 4368 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021212001000 its reverse (10021212002), we get a palindrome (20031233213002).

The spelling of 20021212001000 in words is "twenty trillion, twenty-one billion, two hundred twelve million, one thousand".