21120120212001 has 16 divisors (see below), whose sum is σ = 28186340181696. Its totient is φ = 14066995925696.

The previous prime is 21120120211943. The next prime is 21120120212027. The reversal of 21120120212001 is 10021202102112.

It is a cyclic number.

It is not a de Polignac number, because 21120120212001 - 2¹¹ = 21120120209953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21120120212701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14066311 + ... + 15495203.

It is an arithmetic number, because the mean of its divisors is an integer number (1761646261356).

Almost surely, 2^{21120120212001} is an apocalyptic number.

It is an amenable number.

21120120212001 is a deficient number, since it is larger than the sum of its proper divisors (7066219969695).

21120120212001 is a wasteful number, since it uses less digits than its factorization.

21120120212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433472.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21120120212001 its reverse (10021202102112), we get a palindrome (31141322314113).

The spelling of 21120120212001 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, two hundred twelve thousand, one".