1051221302405 has 16 divisors (see below), whose sum is σ = 1282695763824. Its totient is φ = 826835412480.

The previous prime is 1051221302393. The next prime is 1051221302513. The reversal of 1051221302405 is 5042031221501.

It can be written as a sum of positive squares in 8 ways, for example, as 22299150241 + 1028922152164 = 149329^2 + 1014358^2 .

It is not a de Polignac number, because 1051221302405 - 2⁴ = 1051221302389 is a prime.

It is a super-2 number, since 2×1051221302405² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27104 + ... + 1450233.

It is an arithmetic number, because the mean of its divisors is an integer number (80168485239).

Almost surely, 2^{1051221302405} is an apocalyptic number.

It is an amenable number.

1051221302405 is a deficient number, since it is larger than the sum of its proper divisors (231474461419).

1051221302405 is a wasteful number, since it uses less digits than its factorization.

1051221302405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479736.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 1051221302405 its reverse (5042031221501), we get a palindrome (6093252523906).

The spelling of 1051221302405 in words is "one trillion, fifty-one billion, two hundred twenty-one million, three hundred two thousand, four hundred five".