20102101212 has 12 divisors (see below), whose sum is σ = 46904902856. Its totient is φ = 6700700400.

The previous prime is 20102101211. The next prime is 20102101291. The reversal of 20102101212 is 21210120102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1675175101 = 20102101212 / (2 + 0 + 1 + 0 + 2 + 1 + 0 + 1 + 2 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102101211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837587539 + ... + 837587562.

Almost surely, 2^20102101212 is an apocalyptic number.

It is an amenable number.

20102101212 is an abundant number, since it is smaller than the sum of its proper divisors (26802801644).

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

20102101212 is a wasteful number, since it uses less digits than its factorization.

20102101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675175108 (or 1675175106 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20102101212 its reverse (21210120102), we get a palindrome (41312221314).

The spelling of 20102101212 in words is "twenty billion, one hundred two million, one hundred one thousand, two hundred twelve".