1211333222220 has 96 divisors (see below), whose sum is σ = 3721460440320. Its totient is φ = 291959074560.

The previous prime is 1211333222213. The next prime is 1211333222237. The reversal of 1211333222220 is 222223331121.

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 31 ways as a sum of consecutive naturals, for example, 5190310 + ... + 5418669.

It is an arithmetic number, because the mean of its divisors is an integer number (38765212920).

Almost surely, 2^{1211333222220} is an apocalyptic number.

1211333222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211333222220 is an abundant number, since it is smaller than the sum of its proper divisors (2510127218100).

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

1211333222220 is a wasteful number, since it uses less digits than its factorization.

1211333222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10609175 (or 10609173 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1211333222220 its reverse (222223331121), we get a palindrome (1433556553341).

The spelling of 1211333222220 in words is "one trillion, two hundred eleven billion, three hundred thirty-three million, two hundred twenty-two thousand, two hundred twenty".