1042111021 has 8 divisors (see below), whose sum is σ = 1193750784. Its totient is φ = 891162960.

The previous prime is 1042111019. The next prime is 1042111039. The reversal of 1042111021 is 1201112401.

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

It is a cyclic number.

It is not a de Polignac number, because 1042111021 - 2¹ = 1042111019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1042110992 and 1042111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042111001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169690 + ... + 175723.

It is an arithmetic number, because the mean of its divisors is an integer number (149218848).

Almost surely, 2^1042111021 is an apocalyptic number.

It is an amenable number.

1042111021 is a deficient number, since it is larger than the sum of its proper divisors (151639763).

1042111021 is an equidigital number, since it uses as much as digits as its factorization.

1042111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345851.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1042111021 is about 32281.7443921483. The cubic root of 1042111021 is about 1013.8444535878.

Adding to 1042111021 its reverse (1201112401), we get a palindrome (2243223422).

The spelling of 1042111021 in words is "one billion, forty-two million, one hundred eleven thousand, twenty-one".