1220111100010 has 48 divisors (see below), whose sum is σ = 2414168406216. Its totient is φ = 443646720000.

The previous prime is 1220111099993. The next prime is 1220111100029. The reversal of 1220111100010 is 100011110221.

It can be written as a sum of positive squares in 4 ways, for example, as 1198146970801 + 21964129209 = 1094599^2 + 148203^2 .

It is a super-2 number, since 2×1220111100010² (a number of 25 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1220111100010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26113870 + ... + 26160550.

Almost surely, 2^{1220111100010} is an apocalyptic number.

1220111100010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220111100010 is a deficient number, since it is larger than the sum of its proper divisors (1194057306206).

1220111100010 is a wasteful number, since it uses less digits than its factorization.

1220111100010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68311 (or 68300 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1220111100010 its reverse (100011110221), we get a palindrome (1320122210231).

The spelling of 1220111100010 in words is "one trillion, two hundred twenty billion, one hundred eleven million, one hundred thousand, ten".