1031211020345 has 64 divisors (see below), whose sum is σ = 1448293478400. Its totient is φ = 696515189760.

The previous prime is 1031211020327. The next prime is 1031211020377. The reversal of 1031211020345 is 5430201121301.

1031211020345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1031211020345 - 2³⁸ = 756333113401 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1031211020345.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 182222126 + ... + 182227784.

It is an arithmetic number, because the mean of its divisors is an integer number (22629585600).

Almost surely, 2^{1031211020345} is an apocalyptic number.

It is an amenable number.

1031211020345 is a deficient number, since it is larger than the sum of its proper divisors (417082458055).

1031211020345 is a wasteful number, since it uses less digits than its factorization.

1031211020345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8238.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1031211020345 its reverse (5430201121301), we get a palindrome (6461412141646).

The spelling of 1031211020345 in words is "one trillion, thirty-one billion, two hundred eleven million, twenty thousand, three hundred forty-five".