20120001012 has 72 divisors (see below), whose sum is σ = 52140641280. Its totient is φ = 6537905280.

The previous prime is 20120001001. The next prime is 20120001049. The reversal of 20120001012 is 21010002102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20120000985 and 20120001003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2148813 + ... + 2158155.

Almost surely, 2^20120001012 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 20120001012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26070320640).

20120001012 is an abundant number, since it is smaller than the sum of its proper divisors (32020640268).

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

20120001012 is a wasteful number, since it uses less digits than its factorization.

20120001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10853 (or 10848 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20120001012 its reverse (21010002102), we get a palindrome (41130003114).

The spelling of 20120001012 in words is "twenty billion, one hundred twenty million, one thousand, twelve".