1220000020100 has 36 divisors (see below), whose sum is σ = 2663641797264. Its totient is φ = 485006136480.

The previous prime is 1220000020097. The next prime is 1220000020121. The reversal of 1220000020100 is 10200000221.

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 11 ways as a sum of consecutive naturals, for example, 37407014 + ... + 37439613.

It is an arithmetic number, because the mean of its divisors is an integer number (73990049924).

Almost surely, 2^{1220000020100} is an apocalyptic number.

1220000020100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220000020100 is an abundant number, since it is smaller than the sum of its proper divisors (1443641777164).

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

1220000020100 is a wasteful number, since it uses less digits than its factorization.

1220000020100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74846804 (or 74846797 counting only the distinct ones).

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

Adding to 1220000020100 its reverse (10200000221), we get a palindrome (1230200020321).

The spelling of 1220000020100 in words is "one trillion, two hundred twenty billion, twenty thousand, one hundred".