1020124021 has 8 divisors (see below), whose sum is σ = 1171383104. Its totient is φ = 870246720.

The previous prime is 1020124013. The next prime is 1020124067. The reversal of 1020124021 is 1204210201.

It is a happy number.

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

It is not a de Polignac number, because 1020124021 - 2³ = 1020124013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020123992 and 1020124010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020124921) 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, 343860 + ... + 346813.

It is an arithmetic number, because the mean of its divisors is an integer number (146422888).

Almost surely, 2^1020124021 is an apocalyptic number.

It is an amenable number.

1020124021 is a deficient number, since it is larger than the sum of its proper divisors (151259083).

1020124021 is an equidigital number, since it uses as much as digits as its factorization.

1020124021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690891.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1020124021 is about 31939.3804103962. The cubic root of 1020124021 is about 1006.6635060619.

Adding to 1020124021 its reverse (1204210201), we get a palindrome (2224334222).

The spelling of 1020124021 in words is "one billion, twenty million, one hundred twenty-four thousand, twenty-one".