20002121212101 has 12 divisors (see below), whose sum is σ = 31023698206752. Its totient is φ = 11429783549688.

The previous prime is 20002121212097. The next prime is 20002121212127. The reversal of 20002121212101 is 10121212120002.

It is not a de Polignac number, because 20002121212101 - 2² = 20002121212097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002121312101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68034425745 + ... + 68034426038.

It is an arithmetic number, because the mean of its divisors is an integer number (2585308183896).

Almost surely, 2^{20002121212101} is an apocalyptic number.

20002121212101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20002121212101 is a deficient number, since it is larger than the sum of its proper divisors (11021576994651).

20002121212101 is a wasteful number, since it uses less digits than its factorization.

20002121212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136068851800 (or 136068851793 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20002121212101 its reverse (10121212120002), we get a palindrome (30123333332103).

The spelling of 20002121212101 in words is "twenty trillion, two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred one".