1031320421421 has 32 divisors (see below), whose sum is σ = 1467436658688. Its totient is φ = 643194155520.

The previous prime is 1031320421413. The next prime is 1031320421459. The reversal of 1031320421421 is 1241240231301.

It is not a de Polignac number, because 1031320421421 - 2³ = 1031320421413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031320421391 and 1031320421400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031320422421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 941451 + ... + 1717256.

It is an arithmetic number, because the mean of its divisors is an integer number (45857395584).

Almost surely, 2^{1031320421421} is an apocalyptic number.

It is an amenable number.

1031320421421 is a deficient number, since it is larger than the sum of its proper divisors (436116237267).

1031320421421 is a wasteful number, since it uses less digits than its factorization.

1031320421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658881.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1031320421421 its reverse (1241240231301), we get a palindrome (2272560652722).

The spelling of 1031320421421 in words is "one trillion, thirty-one billion, three hundred twenty million, four hundred twenty-one thousand, four hundred twenty-one".