1200000001010 has 32 divisors (see below), whose sum is σ = 2273929554240. Its totient is φ = 454687774272.

The previous prime is 1200000000977. The next prime is 1200000001021. The reversal of 1200000001010 is 101000000021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1200000000985 and 1200000001003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449377 + ... + 2121483.

It is an arithmetic number, because the mean of its divisors is an integer number (71060298570).

Almost surely, 2^{1200000001010} is an apocalyptic number.

1200000001010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200000001010 is a deficient number, since it is larger than the sum of its proper divisors (1073929553230).

1200000001010 is a wasteful number, since it uses less digits than its factorization.

1200000001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681530.

The product of its (nonzero) digits is 2, while the sum is 5.

Adding to 1200000001010 its reverse (101000000021), we get a palindrome (1301000001031).

The spelling of 1200000001010 in words is "one trillion, two hundred billion, one thousand, ten".