211010001121 has 4 divisors (see below), whose sum is σ = 213380900100. Its totient is φ = 208639102144.

The previous prime is 211010001109. The next prime is 211010001149. The reversal of 211010001121 is 121100010112.

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 85951580625 + 125058420496 = 293175^2 + 353636^2 .

It is a cyclic number.

It is not a de Polignac number, because 211010001121 - 2³¹ = 208862517473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211010001098 and 211010001107.

It is not an unprimeable number, because it can be changed into a prime (211010001101) 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, 1185449356 + ... + 1185449533.

It is an arithmetic number, because the mean of its divisors is an integer number (53345225025).

Almost surely, 2^211010001121 is an apocalyptic number.

It is an amenable number.

211010001121 is a deficient number, since it is larger than the sum of its proper divisors (2370898979).

211010001121 is an equidigital number, since it uses as much as digits as its factorization.

211010001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370898978.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 211010001121 its reverse (121100010112), we get a palindrome (332110011233).

The spelling of 211010001121 in words is "two hundred eleven billion, ten million, one thousand, one hundred twenty-one".