1303253423421 has 32 divisors (see below), whose sum is σ = 1779057561600. Its totient is φ = 848236633536.

The previous prime is 1303253423413. The next prime is 1303253423443. The reversal of 1303253423421 is 1243243523031.

It is not a de Polignac number, because 1303253423421 - 2³ = 1303253423413 is a prime.

It is a super-2 number, since 2×1303253423421² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303253423401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133429480 + ... + 133439246.

It is an arithmetic number, because the mean of its divisors is an integer number (55595548800).

Almost surely, 2^{1303253423421} is an apocalyptic number.

It is an amenable number.

1303253423421 is a deficient number, since it is larger than the sum of its proper divisors (475804138179).

1303253423421 is a wasteful number, since it uses less digits than its factorization.

1303253423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12073.

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 1303253423421 its reverse (1243243523031), we get a palindrome (2546496946452).

The spelling of 1303253423421 in words is "one trillion, three hundred three billion, two hundred fifty-three million, four hundred twenty-three thousand, four hundred twenty-one".