20000122021000 has 256 divisors, whose sum is σ = 51950336256000. Its totient is φ = 7145354080000.

The previous prime is 20000122020979. The next prime is 20000122021013. The reversal of 20000122021000 is 12022100002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1253211021 + ... + 1253226979.

It is an arithmetic number, because the mean of its divisors is an integer number (202931001000).

Almost surely, 2^{20000122021000} is an apocalyptic number.

20000122021000 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 20000122021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25975168128000).

20000122021000 is an abundant number, since it is smaller than the sum of its proper divisors (31950214235000).

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

20000122021000 is a wasteful number, since it uses less digits than its factorization.

20000122021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17981 (or 17967 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20000122021000 its reverse (12022100002), we get a palindrome (20012144121002).

The spelling of 20000122021000 in words is "twenty trillion, one hundred twenty-two million, twenty-one thousand".