1021400305513 has 8 divisors (see below), whose sum is σ = 1167347368832. Its totient is φ = 875461425696.

The previous prime is 1021400305433. The next prime is 1021400305553. The reversal of 1021400305513 is 3155030041201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021400305513 - 2¹³ = 1021400297321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021400305553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1776045 + ... + 2279722.

It is an arithmetic number, because the mean of its divisors is an integer number (145918421104).

Almost surely, 2^{1021400305513} is an apocalyptic number.

It is an amenable number.

1021400305513 is a deficient number, since it is larger than the sum of its proper divisors (145947063319).

1021400305513 is an equidigital number, since it uses as much as digits as its factorization.

1021400305513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091751.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 1021400305513 its reverse (3155030041201), we get a palindrome (4176430346714).

The spelling of 1021400305513 in words is "one trillion, twenty-one billion, four hundred million, three hundred five thousand, five hundred thirteen".