1031203223111 has 24 divisors (see below), whose sum is σ = 1063593185424. Its totient is φ = 999684541440.

The previous prime is 1031203223107. The next prime is 1031203223117. The reversal of 1031203223111 is 1113223021301.

It is a happy number.

It is not a de Polignac number, because 1031203223111 - 2² = 1031203223107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031203223117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188276105 + ... + 188281581.

It is an arithmetic number, because the mean of its divisors is an integer number (44316382726).

Almost surely, 2^{1031203223111} is an apocalyptic number.

1031203223111 is a deficient number, since it is larger than the sum of its proper divisors (32389962313).

1031203223111 is an frugal number, since it uses more digits than its factorization.

1031203223111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371 (or 6318 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1031203223111 its reverse (1113223021301), we get a palindrome (2144426244412).

The spelling of 1031203223111 in words is "one trillion, thirty-one billion, two hundred three million, two hundred twenty-three thousand, one hundred eleven".