1231421301253 has 16 divisors (see below), whose sum is σ = 1446761707776. Its totient is φ = 1033319845440.

The previous prime is 1231421301247. The next prime is 1231421301281. The reversal of 1231421301253 is 3521031241321.

It is a cyclic number.

It is not a de Polignac number, because 1231421301253 - 2¹⁷ = 1231421170181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231421301223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3798676 + ... + 4110082.

It is an arithmetic number, because the mean of its divisors is an integer number (90422606736).

Almost surely, 2^{1231421301253} is an apocalyptic number.

1231421301253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1231421301253 is a deficient number, since it is larger than the sum of its proper divisors (215340406523).

1231421301253 is a wasteful number, since it uses less digits than its factorization.

1231421301253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339084.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 1231421301253 its reverse (3521031241321), we get a palindrome (4752452542574).

The spelling of 1231421301253 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-one million, three hundred one thousand, two hundred fifty-three".