211020000121 has 4 divisors (see below), whose sum is σ = 241165714432. Its totient is φ = 180874285812.

The previous prime is 211020000071. The next prime is 211020000131. The reversal of 211020000121 is 121000020112.

211020000121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211020000121 - 2⁹ = 211019999609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211020000098 and 211020000107.

It is not an unprimeable number, because it can be changed into a prime (211020000131) 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 3 ways as a sum of consecutive naturals, for example, 15072857145 + ... + 15072857158.

It is an arithmetic number, because the mean of its divisors is an integer number (60291428608).

Almost surely, 2^211020000121 is an apocalyptic number.

It is an amenable number.

211020000121 is a deficient number, since it is larger than the sum of its proper divisors (30145714311).

211020000121 is an equidigital number, since it uses as much as digits as its factorization.

211020000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30145714310.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211020000121 its reverse (121000020112), we get a palindrome (332020020233).

The spelling of 211020000121 in words is "two hundred eleven billion, twenty million, one hundred twenty-one", and thus it is an aban number.