1020504315021 has 8 divisors (see below), whose sum is σ = 1419832090560. Its totient is φ = 650756374752.

The previous prime is 1020504314987. The next prime is 1020504315059. The reversal of 1020504315021 is 1205134050201.

It is a happy number.

1020504315021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1020504315021 - 2⁹ = 1020504314509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020504314982 and 1020504315000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020504315071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7394958736 + ... + 7394958873.

It is an arithmetic number, because the mean of its divisors is an integer number (177479011320).

Almost surely, 2^{1020504315021} is an apocalyptic number.

It is an amenable number.

1020504315021 is a deficient number, since it is larger than the sum of its proper divisors (399327775539).

1020504315021 is a wasteful number, since it uses less digits than its factorization.

1020504315021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14789917635.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 1020504315021 its reverse (1205134050201), we get a palindrome (2225638365222).

The spelling of 1020504315021 in words is "one trillion, twenty billion, five hundred four million, three hundred fifteen thousand, twenty-one".