221001020012120 has 32 divisors (see below), whose sum is σ = 507832131096000. Its totient is φ = 86519548259328.

The previous prime is 221001020012093. The next prime is 221001020012231. The reversal of 221001020012120 is 21210020100122.

It is a junction number, because it is equal to n+sod(n) for n = 221001020012095 and 221001020012104.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 58776865145 + ... + 58776868904.

It is an arithmetic number, because the mean of its divisors is an integer number (15869754096750).

Almost surely, 2^{221001020012120} is an apocalyptic number.

221001020012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001020012120 is an abundant number, since it is smaller than the sum of its proper divisors (286831111083880).

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

221001020012120 is a wasteful number, since it uses less digits than its factorization.

221001020012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117553734107 (or 117553734103 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221001020012120 its reverse (21210020100122), we get a palindrome (242211040112242).

The spelling of 221001020012120 in words is "two hundred twenty-one trillion, one billion, twenty million, twelve thousand, one hundred twenty".