210111213031 has 8 divisors (see below), whose sum is σ = 210293020080. Its totient is φ = 209929457472.

The previous prime is 210111213029. The next prime is 210111213049. The reversal of 210111213031 is 130312111012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210111213031 - 2¹ = 210111213029 is a prime.

It is a super-2 number, since 2×210111213031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210111212996 and 210111213014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210111213731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16102596 + ... + 16115638.

It is an arithmetic number, because the mean of its divisors is an integer number (26286627510).

Almost surely, 2^210111213031 is an apocalyptic number.

210111213031 is a deficient number, since it is larger than the sum of its proper divisors (181807049).

210111213031 is a wasteful number, since it uses less digits than its factorization.

210111213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25745.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 210111213031 its reverse (130312111012), we get a palindrome (340423324043).

The spelling of 210111213031 in words is "two hundred ten billion, one hundred eleven million, two hundred thirteen thousand, thirty-one".