1211221100202 has 32 divisors (see below), whose sum is σ = 2576227214400. Its totient is φ = 378547665408.

The previous prime is 1211221100179. The next prime is 1211221100213. The reversal of 1211221100202 is 2020011221121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54755677 + ... + 54777792.

It is an arithmetic number, because the mean of its divisors is an integer number (80507100450).

Almost surely, 2^{1211221100202} is an apocalyptic number.

1211221100202 is an abundant number, since it is smaller than the sum of its proper divisors (1365006114198).

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

1211221100202 is a wasteful number, since it uses less digits than its factorization.

1211221100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109533590.

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

Adding to 1211221100202 its reverse (2020011221121), we get a palindrome (3231232321323).

The spelling of 1211221100202 in words is "one trillion, two hundred eleven billion, two hundred twenty-one million, one hundred thousand, two hundred two".