20010010121020 has 12 divisors (see below), whose sum is σ = 42021021254184. Its totient is φ = 8004004048400.

The previous prime is 20010010120949. The next prime is 20010010121021. The reversal of 20010010121020 is 2012101001002.

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

It is a junction number, because it is equal to n+sod(n) for n = 20010010120988 and 20010010121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010010121021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500250253006 + ... + 500250253045.

It is an arithmetic number, because the mean of its divisors is an integer number (3501751771182).

Almost surely, 2^{20010010121020} is an apocalyptic number.

20010010121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010010121020 is an abundant number, since it is smaller than the sum of its proper divisors (22011011133164).

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

20010010121020 is a wasteful number, since it uses less digits than its factorization.

20010010121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000500506060 (or 1000500506058 counting only the distinct ones).

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

Adding to 20010010121020 its reverse (2012101001002), we get a palindrome (22022111122022).

The spelling of 20010010121020 in words is "twenty trillion, ten billion, ten million, one hundred twenty-one thousand, twenty".