1011112013220 has 24 divisors (see below), whose sum is σ = 2831113637184. Its totient is φ = 269629870176.

The previous prime is 1011112013201. The next prime is 1011112013221. The reversal of 1011112013220 is 223102111101.

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 1011112013220.

It is not an unprimeable number, because it can be changed into a prime (1011112013221) 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, 8425933384 + ... + 8425933503.

It is an arithmetic number, because the mean of its divisors is an integer number (117963068216).

Almost surely, 2^{1011112013220} is an apocalyptic number.

1011112013220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011112013220 is an abundant number, since it is smaller than the sum of its proper divisors (1820001623964).

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

1011112013220 is a wasteful number, since it uses less digits than its factorization.

1011112013220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16851866899 (or 16851866897 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1011112013220 its reverse (223102111101), we get a palindrome (1234214124321).

The spelling of 1011112013220 in words is "one trillion, eleven billion, one hundred twelve million, thirteen thousand, two hundred twenty".