20001010121020 has 48 divisors (see below), whose sum is σ = 42750057571200. Its totient is φ = 7858304824320.

The previous prime is 20001010121011. The next prime is 20001010121069. The reversal of 20001010121020 is 2012101010002.

It is a super-2 number, since 2×20001010121020² (a number of 27 digits) contains 22 as substring.

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 = 20001010120988 and 20001010121006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10523565 + ... + 12277924.

It is an arithmetic number, because the mean of its divisors is an integer number (890626199400).

Almost surely, 2^{20001010121020} is an apocalyptic number.

20001010121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001010121020 is an abundant number, since it is smaller than the sum of its proper divisors (22749047450180).

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

20001010121020 is a wasteful number, since it uses less digits than its factorization.

20001010121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22802278 (or 22802276 counting only the distinct ones).

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

Adding to 20001010121020 its reverse (2012101010002), we get a palindrome (22013111131022).

The spelling of 20001010121020 in words is "twenty trillion, one billion, ten million, one hundred twenty-one thousand, twenty".