211125153121 has 4 divisors (see below), whose sum is σ = 212031269892. Its totient is φ = 210219036352.

The previous prime is 211125153077. The next prime is 211125153143. The reversal of 211125153121 is 121351521112.

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 48768538896 + 162356614225 = 220836^2 + 402935^2 .

It is a cyclic number.

It is not a de Polignac number, because 211125153121 - 2¹⁹ = 211124628833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211129153121) 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, 453058036 + ... + 453058501.

It is an arithmetic number, because the mean of its divisors is an integer number (53007817473).

Almost surely, 2^211125153121 is an apocalyptic number.

It is an amenable number.

211125153121 is a deficient number, since it is larger than the sum of its proper divisors (906116771).

211125153121 is an equidigital number, since it uses as much as digits as its factorization.

211125153121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906116770.

The product of its digits is 600, while the sum is 25.

Adding to 211125153121 its reverse (121351521112), we get a palindrome (332476674233).

The spelling of 211125153121 in words is "two hundred eleven billion, one hundred twenty-five million, one hundred fifty-three thousand, one hundred twenty-one".