1011000221220 has 96 divisors (see below), whose sum is σ = 3088304102016. Its totient is φ = 245078425600.

The previous prime is 1011000221177. The next prime is 1011000221239. The reversal of 1011000221220 is 221220001101.

1011000221220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1011000221196 and 1011000221205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24661540 + ... + 24702500.

It is an arithmetic number, because the mean of its divisors is an integer number (32169834396).

Almost surely, 2^{1011000221220} is an apocalyptic number.

1011000221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011000221220 is an abundant number, since it is smaller than the sum of its proper divisors (2077303880796).

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

1011000221220 is a wasteful number, since it uses less digits than its factorization.

1011000221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78381 (or 78379 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1011000221220 its reverse (221220001101), we get a palindrome (1232220222321).

The spelling of 1011000221220 in words is "one trillion, eleven billion, two hundred twenty-one thousand, two hundred twenty".