10111200012 has 72 divisors (see below), whose sum is σ = 26320221200. Its totient is φ = 3270492288.

The previous prime is 10111199981. The next prime is 10111200013. The reversal of 10111200012 is 21000211101.

It is a happy number.

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 = 10111199967 and 10111200003.

It is not an unprimeable number, because it can be changed into a prime (10111200013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 494814 + ... + 514842.

Almost surely, 2^10111200012 is an apocalyptic number.

10111200012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10111200012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13160110600).

10111200012 is an abundant number, since it is smaller than the sum of its proper divisors (16209021188).

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

10111200012 is a wasteful number, since it uses less digits than its factorization.

10111200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20455 (or 20450 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10111200012 its reverse (21000211101), we get a palindrome (31111411113).

The spelling of 10111200012 in words is "ten billion, one hundred eleven million, two hundred thousand, twelve".