1521022142401 has 2 divisors, whose sum is σ = 1521022142402. Its totient is φ = 1521022142400.

The previous prime is 1521022142347. The next prime is 1521022142429. The reversal of 1521022142401 is 1042412201251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1372892607025 + 148129535376 = 1171705^2 + 384876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1521022142401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1521022143401) 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 as a sum of consecutive naturals, namely, 760511071200 + 760511071201.

It is an arithmetic number, because the mean of its divisors is an integer number (760511071201).

Almost surely, 2^{1521022142401} is an apocalyptic number.

It is an amenable number.

1521022142401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521022142401 is an equidigital number, since it uses as much as digits as its factorization.

1521022142401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 1521022142401 its reverse (1042412201251), we get a palindrome (2563434343652).

The spelling of 1521022142401 in words is "one trillion, five hundred twenty-one billion, twenty-two million, one hundred forty-two thousand, four hundred one".