1021404240013 has 4 divisors (see below), whose sum is σ = 1021459616128. Its totient is φ = 1021348863900.

The previous prime is 1021404239993. The next prime is 1021404240019. The reversal of 1021404240013 is 3100424041201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1021404240013 - 2⁹ = 1021404239501 is a prime.

It is a super-2 number, since 2×1021404240013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021404240019) 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 3 ways as a sum of consecutive naturals, for example, 27660381 + ... + 27697282.

It is an arithmetic number, because the mean of its divisors is an integer number (255364904032).

Almost surely, 2^{1021404240013} is an apocalyptic number.

It is an amenable number.

1021404240013 is a deficient number, since it is larger than the sum of its proper divisors (55376115).

1021404240013 is an equidigital number, since it uses as much as digits as its factorization.

1021404240013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55376114.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1021404240013 its reverse (3100424041201), we get a palindrome (4121828281214).

The spelling of 1021404240013 in words is "one trillion, twenty-one billion, four hundred four million, two hundred forty thousand, thirteen".