1351022510221 has 2 divisors, whose sum is σ = 1351022510222. Its totient is φ = 1351022510220.

The previous prime is 1351022510113. The next prime is 1351022510281. The reversal of 1351022510221 is 1220152201531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 901303396900 + 449719113321 = 949370^2 + 670611^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351022510221 - 2⁹ = 1351022509709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1351022510281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675511255110 + 675511255111.

It is an arithmetic number, because the mean of its divisors is an integer number (675511255111).

Almost surely, 2^{1351022510221} is an apocalyptic number.

It is an amenable number.

1351022510221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351022510221 is an equidigital number, since it uses as much as digits as its factorization.

1351022510221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 1351022510221 its reverse (1220152201531), we get a palindrome (2571174711752).

The spelling of 1351022510221 in words is "one trillion, three hundred fifty-one billion, twenty-two million, five hundred ten thousand, two hundred twenty-one".