20001212102101 has 16 divisors (see below), whose sum is σ = 20421983088000. Its totient is φ = 19582054285248.

The previous prime is 20001212102077. The next prime is 20001212102119. The reversal of 20001212102101 is 10120121210002.

It is a cyclic number.

It is not a de Polignac number, because 20001212102101 - 2⁷ = 20001212101973 is a prime.

It is a super-2 number, since 2×20001212102101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001212102401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520046610 + ... + 520085068.

It is an arithmetic number, because the mean of its divisors is an integer number (1276373943000).

Almost surely, 2^{20001212102101} is an apocalyptic number.

It is an amenable number.

20001212102101 is a deficient number, since it is larger than the sum of its proper divisors (420770985899).

20001212102101 is a wasteful number, since it uses less digits than its factorization.

20001212102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59148.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20001212102101 its reverse (10120121210002), we get a palindrome (30121333312103).

The spelling of 20001212102101 in words is "twenty trillion, one billion, two hundred twelve million, one hundred two thousand, one hundred one".