211243123301 has 6 divisors (see below), whose sum is σ = 245731796550. Its totient is φ = 181065534216.

The previous prime is 211243123211. The next prime is 211243123321. The reversal of 211243123301 is 103321342112.

It can be written as a sum of positive squares in only one way, i.e., 144704920801 + 66538202500 = 380401^2 + 257950^2 .

It is not a de Polignac number, because 211243123301 - 2¹⁸ = 211242861157 is a prime.

It is a super-2 number, since 2×211243123301² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211243123321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2155542026 + ... + 2155542123.

It is an arithmetic number, because the mean of its divisors is an integer number (40955299425).

Almost surely, 2^211243123301 is an apocalyptic number.

It is an amenable number.

211243123301 is a deficient number, since it is larger than the sum of its proper divisors (34488673249).

211243123301 is an equidigital number, since it uses as much as digits as its factorization.

211243123301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311084163 (or 4311084156 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 211243123301 its reverse (103321342112), we get a palindrome (314564465413).

The spelling of 211243123301 in words is "two hundred eleven billion, two hundred forty-three million, one hundred twenty-three thousand, three hundred one".