20122121021020 has 12 divisors (see below), whose sum is σ = 42256454144184. Its totient is φ = 8048848408400.

The previous prime is 20122121020973. The next prime is 20122121021021. The reversal of 20122121021020 is 2012012122102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20122121020985 and 20122121021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122121021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503053025506 + ... + 503053025545.

It is an arithmetic number, because the mean of its divisors is an integer number (3521371178682).

Almost surely, 2^{20122121021020} is an apocalyptic number.

20122121021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122121021020 is an abundant number, since it is smaller than the sum of its proper divisors (22134333123164).

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

20122121021020 is a wasteful number, since it uses less digits than its factorization.

20122121021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006106051060 (or 1006106051058 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20122121021020 its reverse (2012012122102), we get a palindrome (22134133143122).

The spelling of 20122121021020 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, twenty".