1031203123111 has 16 divisors (see below), whose sum is σ = 1180154498560. Its totient is φ = 882661419360.

The previous prime is 1031203123081. The next prime is 1031203123117. The reversal of 1031203123111 is 1113213021301.

It is not a de Polignac number, because 1031203123111 - 2¹³ = 1031203114919 is a prime.

It is a super-2 number, since 2×1031203123111² (a number of 25 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 (1031203123117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27723556 + ... + 27760726.

It is an arithmetic number, because the mean of its divisors is an integer number (73759656160).

Almost surely, 2^{1031203123111} is an apocalyptic number.

1031203123111 is a deficient number, since it is larger than the sum of its proper divisors (148951375449).

1031203123111 is an equidigital number, since it uses as much as digits as its factorization.

1031203123111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42574.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1031203123111 its reverse (1113213021301), we get a palindrome (2144416144412).

The spelling of 1031203123111 in words is "one trillion, thirty-one billion, two hundred three million, one hundred twenty-three thousand, one hundred eleven".