1200121010 has 32 divisors (see below), whose sum is σ = 2364246144. Its totient is φ = 434992000.

The previous prime is 1200121009. The next prime is 1200121019. The reversal of 1200121010 is 101210021.

It is not an unprimeable number, because it can be changed into a prime (1200121019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16670 + ... + 51750.

It is an arithmetic number, because the mean of its divisors is an integer number (73882692).

Almost surely, 2^1200121010 is an apocalyptic number.

1200121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200121010 is a deficient number, since it is larger than the sum of its proper divisors (1164125134).

1200121010 is a wasteful number, since it uses less digits than its factorization.

1200121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35410.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1200121010 is about 34642.7627362484. The cubic root of 1200121010 is about 1062.6942880691.

Adding to 1200121010 its reverse (101210021), we get a palindrome (1301331031).

The spelling of 1200121010 in words is "one billion, two hundred million, one hundred twenty-one thousand, ten".