1020204521213 has 4 divisors (see below), whose sum is σ = 1020210663648. Its totient is φ = 1020198378780.

The previous prime is 1020204521197. The next prime is 1020204521267. The reversal of 1020204521213 is 3121254020201.

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 1020204521213 - 2⁴ = 1020204521197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020204521293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2814953 + ... + 3156638.

It is an arithmetic number, because the mean of its divisors is an integer number (255052665912).

Almost surely, 2^{1020204521213} is an apocalyptic number.

It is an amenable number.

1020204521213 is a deficient number, since it is larger than the sum of its proper divisors (6142435).

1020204521213 is an equidigital number, since it uses as much as digits as its factorization.

1020204521213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6142434.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 1020204521213 its reverse (3121254020201), we get a palindrome (4141458541414).

The spelling of 1020204521213 in words is "one trillion, twenty billion, two hundred four million, five hundred twenty-one thousand, two hundred thirteen".