211220031000103 has 4 divisors (see below), whose sum is σ = 211223437232488. Its totient is φ = 211216624767720.

The previous prime is 211220031000067. The next prime is 211220031000109. The reversal of 211220031000103 is 301000130022112.

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 211220031000103 - 2¹³ = 211220030991911 is a prime.

It is a super-2 number, since 2×211220031000103² (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 (211220031000109) 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, 1703023176 + ... + 1703147197.

It is an arithmetic number, because the mean of its divisors is an integer number (52805859308122).

Almost surely, 2^{211220031000103} is an apocalyptic number.

211220031000103 is a deficient number, since it is larger than the sum of its proper divisors (3406232385).

211220031000103 is an equidigital number, since it uses as much as digits as its factorization.

211220031000103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406232384.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 211220031000103 its reverse (301000130022112), we get a palindrome (512220161022215).

The spelling of 211220031000103 in words is "two hundred eleven trillion, two hundred twenty billion, thirty-one million, one hundred three", and thus it is an aban number.