12111020010 has 24 divisors (see below), whose sum is σ = 31488652260. Its totient is φ = 3229605312.

The previous prime is 12111019993. The next prime is 12111020011. The reversal of 12111020010 is 1002011121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10951413201 + 1159606809 = 104649^2 + 34053^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12111019974 and 12111020001.

It is not an unprimeable number, because it can be changed into a prime (12111020011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67283355 + ... + 67283534.

Almost surely, 2^12111020010 is an apocalyptic number.

12111020010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111020010 is an abundant number, since it is smaller than the sum of its proper divisors (19377632250).

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

12111020010 is a wasteful number, since it uses less digits than its factorization.

12111020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134566902 (or 134566899 counting only the distinct ones).

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

Adding to 12111020010 its reverse (1002011121), we get a palindrome (13113031131).

The spelling of 12111020010 in words is "twelve billion, one hundred eleven million, twenty thousand, ten".