1031321212031 has 16 divisors (see below), whose sum is σ = 1174833676800. Its totient is φ = 896159716320.

The previous prime is 1031321212013. The next prime is 1031321212049. The reversal of 1031321212031 is 1302121231301.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1031321212013) and next prime (1031321212049).

It is not a de Polignac number, because 1031321212031 - 2⁶ = 1031321211967 is a prime.

It is a super-2 number, since 2×1031321212031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031321211994 and 1031321212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031321212331) 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, 1102940 + ... + 1810833.

It is an arithmetic number, because the mean of its divisors is an integer number (73427104800).

Almost surely, 2^{1031321212031} is an apocalyptic number.

1031321212031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1031321212031 is a deficient number, since it is larger than the sum of its proper divisors (143512464769).

1031321212031 is a wasteful number, since it uses less digits than its factorization.

1031321212031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915206.

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

Adding to 1031321212031 its reverse (1302121231301), we get a palindrome (2333442443332).

The spelling of 1031321212031 in words is "one trillion, thirty-one billion, three hundred twenty-one million, two hundred twelve thousand, thirty-one".