20012121002120 has 256 divisors, whose sum is σ = 52617727008000. Its totient is φ = 6782314807296.

The previous prime is 20012121002117. The next prime is 20012121002143. The reversal of 20012121002120 is 2120012121002.

It is a junction number, because it is equal to n+sod(n) for n = 20012121002095 and 20012121002104.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 250459136 + ... + 250539024.

It is an arithmetic number, because the mean of its divisors is an integer number (205537996125).

Almost surely, 2^{20012121002120} is an apocalyptic number.

20012121002120 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 20012121002120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26308863504000).

20012121002120 is an abundant number, since it is smaller than the sum of its proper divisors (32605606005880).

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

20012121002120 is a wasteful number, since it uses less digits than its factorization.

20012121002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80632 (or 80628 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20012121002120 its reverse (2120012121002), we get a palindrome (22132133123122).

The spelling of 20012121002120 in words is "twenty trillion, twelve billion, one hundred twenty-one million, two thousand, one hundred twenty".