1351023542421 has 20 divisors (see below), whose sum is σ = 2101467145632. Its totient is φ = 772013448696.

The previous prime is 1351023542413. The next prime is 1351023542443. The reversal of 1351023542421 is 1242453201531.

It is not a de Polignac number, because 1351023542421 - 2³ = 1351023542413 is a prime.

It is a super-2 number, since 2×1351023542421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351023542461) 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 in 19 ways as a sum of consecutive naturals, for example, 93774801 + ... + 93789206.

Almost surely, 2^{1351023542421} is an apocalyptic number.

It is an amenable number.

1351023542421 is a deficient number, since it is larger than the sum of its proper divisors (750443603211).

1351023542421 is an frugal number, since it uses more digits than its factorization.

1351023542421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187564038 (or 187564017 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 1351023542421 its reverse (1242453201531), we get a palindrome (2593476743952).

The spelling of 1351023542421 in words is "one trillion, three hundred fifty-one billion, twenty-three million, five hundred forty-two thousand, four hundred twenty-one".