1011111012220 has 48 divisors (see below), whose sum is σ = 2168644036608. Its totient is φ = 395814816320.

The previous prime is 1011111012209. The next prime is 1011111012253. The reversal of 1011111012220 is 222101111101.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011111012220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26679885 + ... + 26717755.

It is an arithmetic number, because the mean of its divisors is an integer number (45180084096).

Almost surely, 2^{1011111012220} is an apocalyptic number.

1011111012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011111012220 is an abundant number, since it is smaller than the sum of its proper divisors (1157533024388).

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

1011111012220 is a wasteful number, since it uses less digits than its factorization.

1011111012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66330 (or 66328 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1011111012220 its reverse (222101111101), we get a palindrome (1233212123321).

The spelling of 1011111012220 in words is "one trillion, eleven billion, one hundred eleven million, twelve thousand, two hundred twenty".