120211100120021 has 16 divisors (see below), whose sum is σ = 120638366929728. Its totient is φ = 119784323097600.

The previous prime is 120211100120017. The next prime is 120211100120029. The reversal of 120211100120021 is 120021001112021.

It is a cyclic number.

It is not a de Polignac number, because 120211100120021 - 2² = 120211100120017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120211100119978 and 120211100120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120211100120029) 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, 4178189366 + ... + 4178218136.

It is an arithmetic number, because the mean of its divisors is an integer number (7539897933108).

Almost surely, 2^{120211100120021} is an apocalyptic number.

It is an amenable number.

120211100120021 is a deficient number, since it is larger than the sum of its proper divisors (427266809707).

120211100120021 is a wasteful number, since it uses less digits than its factorization.

120211100120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36772.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 120211100120021 its reverse (120021001112021), we get a palindrome (240232101232042).

The spelling of 120211100120021 in words is "one hundred twenty trillion, two hundred eleven billion, one hundred million, one hundred twenty thousand, twenty-one".