1201221012210 has 64 divisors (see below), whose sum is σ = 2983205237760. Its totient is φ = 309234493440.

The previous prime is 1201221012113. The next prime is 1201221012223. The reversal of 1201221012210 is 122101221021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1201221012210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1198647 + ... + 1959386.

It is an arithmetic number, because the mean of its divisors is an integer number (46612581840).

Almost surely, 2^{1201221012210} is an apocalyptic number.

1201221012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201221012210 is an abundant number, since it is smaller than the sum of its proper divisors (1781984225550).

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

1201221012210 is a wasteful number, since it uses less digits than its factorization.

1201221012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158483.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1201221012210 its reverse (122101221021), we get a palindrome (1323322233231).

The spelling of 1201221012210 in words is "one trillion, two hundred one billion, two hundred twenty-one million, twelve thousand, two hundred ten".