20002121122012 has 96 divisors (see below), whose sum is σ = 38423831846400. Its totient is φ = 9077601715200.

The previous prime is 20002121121973. The next prime is 20002121122019. The reversal of 20002121122012 is 21022112120002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002121122019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180663312 + ... + 180773992.

It is an arithmetic number, because the mean of its divisors is an integer number (400248248400).

Almost surely, 2^{20002121122012} is an apocalyptic number.

It is an amenable number.

20002121122012 is a deficient number, since it is larger than the sum of its proper divisors (18421710724388).

20002121122012 is a wasteful number, since it uses less digits than its factorization.

20002121122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111787 (or 111785 counting only the distinct ones).

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

Adding to 20002121122012 its reverse (21022112120002), we get a palindrome (41024233242014).

The spelling of 20002121122012 in words is "twenty trillion, two billion, one hundred twenty-one million, one hundred twenty-two thousand, twelve".