120002100221 has 16 divisors (see below), whose sum is σ = 124137105408. Its totient is φ = 115883913600.

The previous prime is 120002100203. The next prime is 120002100287. The reversal of 120002100221 is 122001200021.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120002100221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120002100721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39202031 + ... + 39205091.

It is an arithmetic number, because the mean of its divisors is an integer number (7758569088).

Almost surely, 2^120002100221 is an apocalyptic number.

It is an amenable number.

120002100221 is a deficient number, since it is larger than the sum of its proper divisors (4135005187).

120002100221 is a wasteful number, since it uses less digits than its factorization.

120002100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 120002100221 its reverse (122001200021), we get a palindrome (242003300242).

The spelling of 120002100221 in words is "one hundred twenty billion, two million, one hundred thousand, two hundred twenty-one".