12001220010 has 80 divisors (see below), whose sum is σ = 34752281256. Its totient is φ = 2954143872.

The previous prime is 12001219987. The next prime is 12001220027. The reversal of 12001220010 is 1002210021.

It can be written as a sum of positive squares in 4 ways, for example, as 6048017361 + 5953202649 = 77769^2 + 77157^2 .

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 = 12001219974 and 12001220001.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 559329 + ... + 580388.

Almost surely, 2^12001220010 is an apocalyptic number.

12001220010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12001220010 is an abundant number, since it is smaller than the sum of its proper divisors (22751061246).

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

12001220010 is a wasteful number, since it uses less digits than its factorization.

12001220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139749 (or 1139740 counting only the distinct ones).

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

Adding to 12001220010 its reverse (1002210021), we get a palindrome (13003430031).

The spelling of 12001220010 in words is "twelve billion, one million, two hundred twenty thousand, ten".