20101212012 has 96 divisors (see below), whose sum is σ = 56873940480. Its totient is φ = 5394170880.

The previous prime is 20101211971. The next prime is 20101212023. The reversal of 20101212012 is 21021210102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 686814 + ... + 715482.

It is an arithmetic number, because the mean of its divisors is an integer number (592436880).

Almost surely, 2^20101212012 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 20101212012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28436970240).

20101212012 is an abundant number, since it is smaller than the sum of its proper divisors (36772728468).

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

20101212012 is a wasteful number, since it uses less digits than its factorization.

20101212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29191 (or 29189 counting only the distinct ones).

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

Adding to 20101212012 its reverse (21021210102), we get a palindrome (41122422114).

The spelling of 20101212012 in words is "twenty billion, one hundred one million, two hundred twelve thousand, twelve".