221111000010120 has 128 divisors (see below), whose sum is σ = 766202823642240. Its totient is φ = 50449568624640.

The previous prime is 221111000010113. The next prime is 221111000010127. The reversal of 221111000010120 is 21010000111122.

It is an interprime number because it is at equal distance from previous prime (221111000010113) and next prime (221111000010127).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221111000010096 and 221111000010105.

It is not an unprimeable number, because it can be changed into a prime (221111000010127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4926693247 + ... + 4926738126.

It is an arithmetic number, because the mean of its divisors is an integer number (5985959559705).

Almost surely, 2^{221111000010120} is an apocalyptic number.

221111000010120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111000010120 is an abundant number, since it is smaller than the sum of its proper divisors (545091823632120).

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

221111000010120 is a wasteful number, since it uses less digits than its factorization.

221111000010120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9853431415 (or 9853431411 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221111000010120 its reverse (21010000111122), we get a palindrome (242121000121242).

The spelling of 221111000010120 in words is "two hundred twenty-one trillion, one hundred eleven billion, ten thousand, one hundred twenty".