1041020021 has 4 divisors (see below), whose sum is σ = 1074601344. Its totient is φ = 1007438700.

The previous prime is 1041020017. The next prime is 1041020023. The reversal of 1041020021 is 1200201401.

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 1041020021 - 2² = 1041020017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1041019984 and 1041020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1041020023) 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, 16790615 + ... + 16790676.

It is an arithmetic number, because the mean of its divisors is an integer number (268650336).

Almost surely, 2^1041020021 is an apocalyptic number.

It is an amenable number.

1041020021 is a deficient number, since it is larger than the sum of its proper divisors (33581323).

1041020021 is an equidigital number, since it uses as much as digits as its factorization.

1041020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33581322.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1041020021 is about 32264.8418716100. The cubic root of 1041020021 is about 1013.4905275986.

Adding to 1041020021 its reverse (1200201401), we get a palindrome (2241221422).

The spelling of 1041020021 in words is "one billion, forty-one million, twenty thousand, twenty-one".