20002121002112 has 128 divisors (see below), whose sum is σ = 41017260816000. Its totient is φ = 9712997392384.

The previous prime is 20002121002109. The next prime is 20002121002147. The reversal of 20002121002112 is 21120012120002.

It is a tau number, because it is divible by the number of its divisors (128).

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, 163516589 + ... + 163638867.

It is an arithmetic number, because the mean of its divisors is an integer number (320447350125).

Almost surely, 2^{20002121002112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20002121002112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20508630408000).

20002121002112 is an abundant number, since it is smaller than the sum of its proper divisors (21015139813888).

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

20002121002112 is a wasteful number, since it uses less digits than its factorization.

20002121002112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122638 (or 122626 counting only the distinct ones).

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

Adding to 20002121002112 its reverse (21120012120002), we get a palindrome (41122133122114).

The spelling of 20002121002112 in words is "twenty trillion, two billion, one hundred twenty-one million, two thousand, one hundred twelve".