1013021013421 has 2 divisors, whose sum is σ = 1013021013422. Its totient is φ = 1013021013420.

The previous prime is 1013021013397. The next prime is 1013021013463. The reversal of 1013021013421 is 1243101203101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995034180196 + 17986833225 = 997514^2 + 134115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013021013421 - 2³⁹ = 463265199533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1013021113421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506510506710 + 506510506711.

It is an arithmetic number, because the mean of its divisors is an integer number (506510506711).

Almost surely, 2^{1013021013421} is an apocalyptic number.

It is an amenable number.

1013021013421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013021013421 is an equidigital number, since it uses as much as digits as its factorization.

1013021013421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1013021013421 its reverse (1243101203101), we get a palindrome (2256122216522).

The spelling of 1013021013421 in words is "one trillion, thirteen billion, twenty-one million, thirteen thousand, four hundred twenty-one".