20012322121020 has 144 divisors (see below), whose sum is σ = 61294902990048. Its totient is φ = 5284713884160.

The previous prime is 20012322120961. The next prime is 20012322121049. The reversal of 20012322121020 is 2012122321002.

20012322121020 is a `hidden beast` number, since 200 + 1 + 2 + 322 + 121 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20012322120984 and 20012322121002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50282242 + ... + 50678678.

It is an arithmetic number, because the mean of its divisors is an integer number (425659048542).

Almost surely, 2^{20012322121020} is an apocalyptic number.

20012322121020 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 20012322121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30647451495024).

20012322121020 is an abundant number, since it is smaller than the sum of its proper divisors (41282580869028).

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

20012322121020 is a wasteful number, since it uses less digits than its factorization.

20012322121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399180 (or 399175 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20012322121020 its reverse (2012122321002), we get a palindrome (22024444442022).

The spelling of 20012322121020 in words is "twenty trillion, twelve billion, three hundred twenty-two million, one hundred twenty-one thousand, twenty".