221002120120 has 32 divisors (see below), whose sum is σ = 498074025600. Its totient is φ = 88255202688.

The previous prime is 221002120111. The next prime is 221002120139. The reversal of 221002120120 is 21021200122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221002120120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4526835 + ... + 4575394.

It is an arithmetic number, because the mean of its divisors is an integer number (15564813300).

Almost surely, 2^221002120120 is an apocalyptic number.

221002120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002120120 is an abundant number, since it is smaller than the sum of its proper divisors (277071905480).

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

221002120120 is a wasteful number, since it uses less digits than its factorization.

221002120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9102847 (or 9102843 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221002120120 its reverse (21021200122), we get a palindrome (242023320242).

The spelling of 221002120120 in words is "two hundred twenty-one billion, two million, one hundred twenty thousand, one hundred twenty".