1351221334541 has 4 divisors (see below), whose sum is σ = 1455161437212. Its totient is φ = 1247281231872.

The previous prime is 1351221334531. The next prime is 1351221334549. The reversal of 1351221334541 is 1454331221531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 248647833316 + 1102573501225 = 498646^2 + 1050035^2 .

It is not a de Polignac number, because 1351221334541 - 2¹⁴ = 1351221318157 is a prime.

It is a super-2 number, since 2×1351221334541² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351221334549) 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, 51970051316 + ... + 51970051341.

It is an arithmetic number, because the mean of its divisors is an integer number (363790359303).

Almost surely, 2^{1351221334541} is an apocalyptic number.

It is an amenable number.

1351221334541 is a deficient number, since it is larger than the sum of its proper divisors (103940102671).

1351221334541 is a wasteful number, since it uses less digits than its factorization.

1351221334541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103940102670.

The product of its digits is 43200, while the sum is 35.

The spelling of 1351221334541 in words is "one trillion, three hundred fifty-one billion, two hundred twenty-one million, three hundred thirty-four thousand, five hundred forty-one".