1220111202020 has 12 divisors (see below), whose sum is σ = 2562233524284. Its totient is φ = 488044480800.

The previous prime is 1220111201951. The next prime is 1220111202047. The reversal of 1220111202020 is 202021110221.

It can be written as a sum of positive squares in 2 ways, for example, as 904518927844 + 315592274176 = 951062^2 + 561776^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220111201986 and 1220111202004.

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 3 ways as a sum of consecutive naturals, for example, 30502780031 + ... + 30502780070.

It is an arithmetic number, because the mean of its divisors is an integer number (213519460357).

Almost surely, 2^{1220111202020} is an apocalyptic number.

1220111202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220111202020 is an abundant number, since it is smaller than the sum of its proper divisors (1342122322264).

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

1220111202020 is a wasteful number, since it uses less digits than its factorization.

1220111202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61005560110 (or 61005560108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220111202020 its reverse (202021110221), we get a palindrome (1422132312241).

The spelling of 1220111202020 in words is "one trillion, two hundred twenty billion, one hundred eleven million, two hundred two thousand, twenty".