1051042121 has 4 divisors (see below), whose sum is σ = 1051541652. Its totient is φ = 1050542592.

The previous prime is 1051042087. The next prime is 1051042123. The reversal of 1051042121 is 1212401501.

1051042121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1212401501 = 83 ⋅14607247.

It can be written as a sum of positive squares in 2 ways, for example, as 178489600 + 872552521 = 13360^2 + 29539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051042121 is a prime.

It is a super-2 number, since 2×1051042121² = 2209379080232357282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1051042121.

It is not an unprimeable number, because it can be changed into a prime (1051042123) 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, 246596 + ... + 250821.

It is an arithmetic number, because the mean of its divisors is an integer number (262885413).

Almost surely, 2^1051042121 is an apocalyptic number.

It is an amenable number.

1051042121 is a deficient number, since it is larger than the sum of its proper divisors (499531).

1051042121 is an equidigital number, since it uses as much as digits as its factorization.

1051042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499530.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1051042121 is about 32419.7797802514. The cubic root of 1051042121 is about 1016.7325021358.

Adding to 1051042121 its reverse (1212401501), we get a palindrome (2263443622).

The spelling of 1051042121 in words is "one billion, fifty-one million, forty-two thousand, one hundred twenty-one".