20021220212000 has 192 divisors, whose sum is σ = 59526622262016. Its totient is φ = 6460628889600.

The previous prime is 20021220211943. The next prime is 20021220212029. The reversal of 20021220212000 is 21202212002.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20554694 + ... + 21506693.

It is an arithmetic number, because the mean of its divisors is an integer number (310034490948).

Almost surely, 2^{20021220212000} is an apocalyptic number.

20021220212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021220212000 is an abundant number, since it is smaller than the sum of its proper divisors (39505402050016).

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

20021220212000 is a wasteful number, since it uses less digits than its factorization.

20021220212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42061436 (or 42061418 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20021220212000 its reverse (21202212002), we get a palindrome (20042422424002).

The spelling of 20021220212000 in words is "twenty trillion, twenty-one billion, two hundred twenty million, two hundred twelve thousand".