211031103101213 has 4 divisors (see below), whose sum is σ = 218308037690940. Its totient is φ = 203754168511488.

The previous prime is 211031103101209. The next prime is 211031103101261. The reversal of 211031103101213 is 312101301130112.

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 37387574953444 + 173643528147769 = 6114538^2 + 13177387^2 .

It is a cyclic number.

It is not a de Polignac number, because 211031103101213 - 2² = 211031103101209 is a prime.

It is a super-2 number, since 2×211031103101213² (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 (211031103101263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3638467294820 + ... + 3638467294877.

It is an arithmetic number, because the mean of its divisors is an integer number (54577009422735).

Almost surely, 2^{211031103101213} is an apocalyptic number.

It is an amenable number.

211031103101213 is a deficient number, since it is larger than the sum of its proper divisors (7276934589727).

211031103101213 is an equidigital number, since it uses as much as digits as its factorization.

211031103101213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276934589726.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 211031103101213 its reverse (312101301130112), we get a palindrome (523132404231325).

The spelling of 211031103101213 in words is "two hundred eleven trillion, thirty-one billion, one hundred three million, one hundred one thousand, two hundred thirteen".