101111110221220 has 48 divisors (see below), whose sum is σ = 231637106937600. Its totient is φ = 36767558136320.

The previous prime is 101111110221179. The next prime is 101111110221221. The reversal of 101111110221220 is 22122011111101.

It is a super-2 number, since 2×101111110221220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101111110221194 and 101111110221203.

It is not an unprimeable number, because it can be changed into a prime (101111110221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97208661 + ... + 98243299.

It is an arithmetic number, because the mean of its divisors is an integer number (4825773061200).

Almost surely, 2^{101111110221220} is an apocalyptic number.

101111110221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101111110221220 is an abundant number, since it is smaller than the sum of its proper divisors (130525996716380).

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

101111110221220 is a wasteful number, since it uses less digits than its factorization.

101111110221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478868 (or 1478866 counting only the distinct ones).

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

Adding to 101111110221220 its reverse (22122011111101), we get a palindrome (123233121332321).

The spelling of 101111110221220 in words is "one hundred one trillion, one hundred eleven billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty".