1051323121 has 4 divisors (see below), whose sum is σ = 1051643200. Its totient is φ = 1051003044.

The previous prime is 1051323103. The next prime is 1051323131. The reversal of 1051323121 is 1213231501.

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 1051323121 - 2¹⁷ = 1051192049 is a prime.

It is a super-2 number, since 2×1051323121² = 2210560609498361282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051323101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155061 + ... + 161698.

It is an arithmetic number, because the mean of its divisors is an integer number (262910800).

Almost surely, 2^1051323121 is an apocalyptic number.

It is an amenable number.

1051323121 is a deficient number, since it is larger than the sum of its proper divisors (320079).

1051323121 is an equidigital number, since it uses as much as digits as its factorization.

1051323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320078.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1051323121 is about 32424.1132646677. The cubic root of 1051323121 is about 1016.8231031276.

Adding to 1051323121 its reverse (1213231501), we get a palindrome (2264554622).

The spelling of 1051323121 in words is "one billion, fifty-one million, three hundred twenty-three thousand, one hundred twenty-one".