211131120401 has 4 divisors (see below), whose sum is σ = 211132180404. Its totient is φ = 211130060400.

The previous prime is 211131120383. The next prime is 211131120439. The reversal of 211131120401 is 104021131112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28076353600 + 183054766801 = 167560^2 + 427849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211131120401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211131120401.

It is not an unprimeable number, because it can be changed into a prime (211131120481) 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, 131210 + ... + 662931.

It is an arithmetic number, because the mean of its divisors is an integer number (52783045101).

Almost surely, 2^211131120401 is an apocalyptic number.

It is an amenable number.

211131120401 is a deficient number, since it is larger than the sum of its proper divisors (1060003).

211131120401 is an equidigital number, since it uses as much as digits as its factorization.

211131120401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060002.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211131120401 its reverse (104021131112), we get a palindrome (315152251513).

The spelling of 211131120401 in words is "two hundred eleven billion, one hundred thirty-one million, one hundred twenty thousand, four hundred one".