100001111222120 has 16 divisors (see below), whose sum is σ = 225002500249860. Its totient is φ = 40000444488832.

The previous prime is 100001111222113. The next prime is 100001111222137. The reversal of 100001111222120 is 21222111100001.

It can be written as a sum of positive squares in 2 ways, for example, as 86517865044004 + 13483246178116 = 9301498^2 + 3671954^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100001111222095 and 100001111222104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250013890237 + ... + 1250013890316.

Almost surely, 2^{100001111222120} is an apocalyptic number.

100001111222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100001111222120 is an abundant number, since it is smaller than the sum of its proper divisors (125001389027740).

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

100001111222120 is a wasteful number, since it uses less digits than its factorization.

100001111222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500027780564 (or 2500027780560 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100001111222120 its reverse (21222111100001), we get a palindrome (121223222322121).

The spelling of 100001111222120 in words is "one hundred trillion, one billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twenty".