211212113232101 has 4 divisors (see below), whose sum is σ = 211469375246604. Its totient is φ = 210954851217600.

The previous prime is 211212113232089. The next prime is 211212113232139. The reversal of 211212113232101 is 101232311212112.

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 96722327232001 + 114489786000100 = 9834751^2 + 10699990^2 .

It is a cyclic number.

It is not a de Polignac number, because 211212113232101 - 2¹⁴ = 211212113215717 is a prime.

It is a super-2 number, since 2×211212113232101² (a number of 29 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 (211212113232191) 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, 128631006020 + ... + 128631007661.

It is an arithmetic number, because the mean of its divisors is an integer number (52867343811651).

Almost surely, 2^{211212113232101} is an apocalyptic number.

It is an amenable number.

211212113232101 is a deficient number, since it is larger than the sum of its proper divisors (257262014503).

211212113232101 is an equidigital number, since it uses as much as digits as its factorization.

211212113232101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257262014502.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 211212113232101 its reverse (101232311212112), we get a palindrome (312444424444213).

The spelling of 211212113232101 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred thirteen million, two hundred thirty-two thousand, one hundred one".