211201000121 has 4 divisors (see below), whose sum is σ = 211203611892. Its totient is φ = 211198388352.

The previous prime is 211201000079. The next prime is 211201000183. The reversal of 211201000121 is 121000102112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 202985390521 + 8215609600 = 450539^2 + 90640^2 .

It is a cyclic number.

It is not a de Polignac number, because 211201000121 - 2³⁴ = 194021130937 is a prime.

It is a super-2 number, since 2×211201000121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211201000421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180580 + ... + 1347653.

It is an arithmetic number, because the mean of its divisors is an integer number (52800902973).

Almost surely, 2^211201000121 is an apocalyptic number.

It is an amenable number.

211201000121 is a deficient number, since it is larger than the sum of its proper divisors (2611771).

211201000121 is an equidigital number, since it uses as much as digits as its factorization.

211201000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611770.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211201000121 its reverse (121000102112), we get a palindrome (332201102233).

The spelling of 211201000121 in words is "two hundred eleven billion, two hundred one million, one hundred twenty-one", and thus it is an aban number.