1020140034521 has 4 divisors (see below), whose sum is σ = 1027479171600. Its totient is φ = 1012800897444.

The previous prime is 1020140034517. The next prime is 1020140034523. The reversal of 1020140034521 is 1254300410201.

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 1020140034521 - 2² = 1020140034517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020140034523) 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, 3669568331 + ... + 3669568608.

It is an arithmetic number, because the mean of its divisors is an integer number (256869792900).

Almost surely, 2^{1020140034521} is an apocalyptic number.

It is an amenable number.

1020140034521 is a deficient number, since it is larger than the sum of its proper divisors (7339137079).

1020140034521 is an equidigital number, since it uses as much as digits as its factorization.

1020140034521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7339137078.

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

Adding to 1020140034521 its reverse (1254300410201), we get a palindrome (2274440444722).

The spelling of 1020140034521 in words is "one trillion, twenty billion, one hundred forty million, thirty-four thousand, five hundred twenty-one".