1200021221210 has 16 divisors (see below), whose sum is σ = 2468615083776. Its totient is φ = 411435847248.

The previous prime is 1200021221209. The next prime is 1200021221213. The reversal of 1200021221210 is 121221200021.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1200021221213) 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, 8571580082 + ... + 8571580221.

It is an arithmetic number, because the mean of its divisors is an integer number (154288442736).

Almost surely, 2^{1200021221210} is an apocalyptic number.

1200021221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200021221210 is an abundant number, since it is smaller than the sum of its proper divisors (1268593862566).

1200021221210 is a wasteful number, since it uses less digits than its factorization.

1200021221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17143160317.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1200021221210 its reverse (121221200021), we get a palindrome (1321242421231).

The spelling of 1200021221210 in words is "one trillion, two hundred billion, twenty-one million, two hundred twenty-one thousand, two hundred ten".