1031212111321 has 12 divisors (see below), whose sum is σ = 1199813520000. Its totient is φ = 883719070920.

The previous prime is 1031212111291. The next prime is 1031212111357. The reversal of 1031212111321 is 1231112121301.

It is not a de Polignac number, because 1031212111321 - 2¹¹ = 1031212109273 is a prime.

It is a super-2 number, since 2×1031212111321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031212171321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1859985 + ... + 2349886.

It is an arithmetic number, because the mean of its divisors is an integer number (99984460000).

Almost surely, 2^{1031212111321} is an apocalyptic number.

It is an amenable number.

1031212111321 is a deficient number, since it is larger than the sum of its proper divisors (168601408679).

1031212111321 is an equidigital number, since it uses as much as digits as its factorization.

1031212111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4214884 (or 4214877 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1031212111321 its reverse (1231112121301), we get a palindrome (2262324232622).

The spelling of 1031212111321 in words is "one trillion, thirty-one billion, two hundred twelve million, one hundred eleven thousand, three hundred twenty-one".