1051011421 has 2 divisors, whose sum is σ = 1051011422. Its totient is φ = 1051011420.

The previous prime is 1051011407. The next prime is 1051011439. The reversal of 1051011421 is 1241101501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 867950521 + 183060900 = 29461^2 + 13530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051011421 - 2¹¹ = 1051009373 is a prime.

It is a super-2 number, since 2×1051011421² = 2209250014144878482, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1051011395 and 1051011404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051011121) 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 as a sum of consecutive naturals, namely, 525505710 + 525505711.

It is an arithmetic number, because the mean of its divisors is an integer number (525505711).

Almost surely, 2^1051011421 is an apocalyptic number.

It is an amenable number.

1051011421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051011421 is an equidigital number, since it uses as much as digits as its factorization.

1051011421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1051011421 is about 32419.3063004130. The cubic root of 1051011421 is about 1016.7226027571.

Adding to 1051011421 its reverse (1241101501), we get a palindrome (2292112922).

The spelling of 1051011421 in words is "one billion, fifty-one million, eleven thousand, four hundred twenty-one".