1200100010 has 16 divisors (see below), whose sum is σ = 2165740200. Its totient is φ = 478804416.

The previous prime is 1200099961. The next prime is 1200100019. The reversal of 1200100010 is 100010021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1126877761 + 73222249 = 33569^2 + 8557^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1200099967 and 1200100003.

It is not an unprimeable number, because it can be changed into a prime (1200100019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150365 + ... + 158144.

Almost surely, 2^1200100010 is an apocalyptic number.

1200100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200100010 is a deficient number, since it is larger than the sum of its proper divisors (965640190).

1200100010 is a wasteful number, since it uses less digits than its factorization.

1200100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308905.

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

The square root of 1200100010 is about 34642.4596413130. The cubic root of 1200100010 is about 1062.6880896080.

Adding to 1200100010 its reverse (100010021), we get a palindrome (1300110031).

The spelling of 1200100010 in words is "one billion, two hundred million, one hundred thousand, ten".