211075123031 has 4 divisors (see below), whose sum is σ = 211179154200. Its totient is φ = 210971091864.

The previous prime is 211075123027. The next prime is 211075123043. The reversal of 211075123031 is 130321570112.

211075123031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211075123031 - 2² = 211075123027 is a prime.

It is a super-2 number, since 2×211075123031² (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 (211075123001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52012541 + ... + 52016598.

It is an arithmetic number, because the mean of its divisors is an integer number (52794788550).

Almost surely, 2^211075123031 is an apocalyptic number.

211075123031 is a deficient number, since it is larger than the sum of its proper divisors (104031169).

211075123031 is a wasteful number, since it uses less digits than its factorization.

211075123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104031168.

The product of its (nonzero) digits is 1260, while the sum is 26.

Adding to 211075123031 its reverse (130321570112), we get a palindrome (341396693143).

The spelling of 211075123031 in words is "two hundred eleven billion, seventy-five million, one hundred twenty-three thousand, thirty-one".