1021521140013 has 64 divisors (see below), whose sum is σ = 1633695897600. Its totient is φ = 560795477760.

The previous prime is 1021521140011. The next prime is 1021521140063. The reversal of 1021521140013 is 3100411251201.

It is not a de Polignac number, because 1021521140013 - 2¹ = 1021521140011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021521140011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1600131 + ... + 2145567.

It is an arithmetic number, because the mean of its divisors is an integer number (25526498400).

Almost surely, 2^{1021521140013} is an apocalyptic number.

It is an amenable number.

1021521140013 is a deficient number, since it is larger than the sum of its proper divisors (612174757587).

1021521140013 is a wasteful number, since it uses less digits than its factorization.

1021521140013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545602.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 1021521140013 its reverse (3100411251201), we get a palindrome (4121932391214).

The spelling of 1021521140013 in words is "one trillion, twenty-one billion, five hundred twenty-one million, one hundred forty thousand, thirteen".