20010121021000 has 384 divisors, whose sum is σ = 52029928903680. Its totient is φ = 7197146880000.

The previous prime is 20010121020991. The next prime is 20010121021003. The reversal of 20010121021000 is 12012101002.

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

It is not an unprimeable number, because it can be changed into a prime (20010121021003) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8299509795 + ... + 8299512205.

It is an arithmetic number, because the mean of its divisors is an integer number (135494606520).

Almost surely, 2^{20010121021000} is an apocalyptic number.

20010121021000 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 20010121021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26014964451840).

20010121021000 is an abundant number, since it is smaller than the sum of its proper divisors (32019807882680).

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

20010121021000 is a wasteful number, since it uses less digits than its factorization.

20010121021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3174 (or 3149 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20010121021000 its reverse (12012101002), we get a palindrome (20022133122002).

The spelling of 20010121021000 in words is "twenty trillion, ten billion, one hundred twenty-one million, twenty-one thousand".