1031211021103 has 2 divisors, whose sum is σ = 1031211021104. Its totient is φ = 1031211021102.

The previous prime is 1031211021089. The next prime is 1031211021131. The reversal of 1031211021103 is 3011201121301.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1031211021103 - 2²¹ = 1031208923951 is a prime.

It is a super-2 number, since 2×1031211021103² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031211021133) 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 as a sum of consecutive naturals, namely, 515605510551 + 515605510552.

It is an arithmetic number, because the mean of its divisors is an integer number (515605510552).

Almost surely, 2^{1031211021103} is an apocalyptic number.

1031211021103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031211021103 is an equidigital number, since it uses as much as digits as its factorization.

1031211021103 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1031211021103 its reverse (3011201121301), we get a palindrome (4042412142404).

The spelling of 1031211021103 in words is "one trillion, thirty-one billion, two hundred eleven million, twenty-one thousand, one hundred three".