1020134021 has 4 divisors (see below), whose sum is σ = 1043858112. Its totient is φ = 996409932.

The previous prime is 1020134009. The next prime is 1020134023. The reversal of 1020134021 is 1204310201.

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 not a de Polignac number, because 1020134021 - 2¹⁸ = 1019871877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020133987 and 1020134005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020134023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11861981 + ... + 11862066.

It is an arithmetic number, because the mean of its divisors is an integer number (260964528).

Almost surely, 2^1020134021 is an apocalyptic number.

It is an amenable number.

1020134021 is a deficient number, since it is larger than the sum of its proper divisors (23724091).

1020134021 is an equidigital number, since it uses as much as digits as its factorization.

1020134021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23724090.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1020134021 is about 31939.5369565684. The cubic root of 1020134021 is about 1006.6667954013. Note that the first 3 decimals are identical.

Adding to 1020134021 its reverse (1204310201), we get a palindrome (2224444222).

The spelling of 1020134021 in words is "one billion, twenty million, one hundred thirty-four thousand, twenty-one".