1220000111020 has 96 divisors (see below), whose sum is σ = 2663092051200. Its totient is φ = 469228032000.

The previous prime is 1220000111009. The next prime is 1220000111117. The reversal of 1220000111020 is 201110000221.

It is a super-3 number, since 3×1220000111020³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1220000110988 and 1220000111006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9671716 + ... + 9797044.

It is an arithmetic number, because the mean of its divisors is an integer number (27740542200).

Almost surely, 2^{1220000111020} is an apocalyptic number.

1220000111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220000111020 is an abundant number, since it is smaller than the sum of its proper divisors (1443091940180).

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

1220000111020 is a wasteful number, since it uses less digits than its factorization.

1220000111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125579 (or 125577 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1220000111020 its reverse (201110000221), we get a palindrome (1421110111241).

The spelling of 1220000111020 in words is "one trillion, two hundred twenty billion, one hundred eleven thousand, twenty".