1111213201220 has 24 divisors (see below), whose sum is σ = 2368376795904. Its totient is φ = 437851171296.

The previous prime is 1111213201211. The next prime is 1111213201223. The reversal of 1111213201220 is 221023121111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1111213201223) 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, 414630452 + ... + 414633131.

It is an arithmetic number, because the mean of its divisors is an integer number (98682366496).

Almost surely, 2^{1111213201220} is an apocalyptic number.

1111213201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111213201220 is an abundant number, since it is smaller than the sum of its proper divisors (1257163594684).

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

1111213201220 is a wasteful number, since it uses less digits than its factorization.

1111213201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829263659 (or 829263657 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1111213201220 its reverse (221023121111), we get a palindrome (1332236322331).

The spelling of 1111213201220 in words is "one trillion, one hundred eleven billion, two hundred thirteen million, two hundred one thousand, two hundred twenty".