20120122002120 has 128 divisors (see below), whose sum is σ = 73041115219200. Its totient is φ = 4328362377216.

The previous prime is 20120122002083. The next prime is 20120122002121. The reversal of 20120122002120 is 2120022102102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20120122002120.

It is not an unprimeable number, because it can be changed into a prime (20120122002121) 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 31 ways as a sum of consecutive naturals, for example, 704471785 + ... + 704500344.

It is an arithmetic number, because the mean of its divisors is an integer number (570633712650).

Almost surely, 2^{20120122002120} is an apocalyptic number.

20120122002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120122002120 is an abundant number, since it is smaller than the sum of its proper divisors (52920993217080).

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

20120122002120 is a wasteful number, since it uses less digits than its factorization.

20120122002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408972167 (or 1408972163 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20120122002120 its reverse (2120022102102), we get a palindrome (22240144104222).

The spelling of 20120122002120 in words is "twenty trillion, one hundred twenty billion, one hundred twenty-two million, two thousand, one hundred twenty".