1031211321231 has 16 divisors (see below), whose sum is σ = 1692244219904. Its totient is φ = 543935641824.

The previous prime is 1031211321229. The next prime is 1031211321341. The reversal of 1031211321231 is 1321231121301.

1031211321231 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 1031211321231 - 2¹ = 1031211321229 is a prime.

It is a super-2 number, since 2×1031211321231² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1031211321198 and 1031211321207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031211321221) 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, 1888665151 + ... + 1888665696.

It is an arithmetic number, because the mean of its divisors is an integer number (105765263744).

Almost surely, 2^{1031211321231} is an apocalyptic number.

1031211321231 is a deficient number, since it is larger than the sum of its proper divisors (661032898673).

1031211321231 is a wasteful number, since it uses less digits than its factorization.

1031211321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777330870.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1031211321231 its reverse (1321231121301), we get a palindrome (2352442442532).

The spelling of 1031211321231 in words is "one trillion, thirty-one billion, two hundred eleven million, three hundred twenty-one thousand, two hundred thirty-one".