1251421114405 has 32 divisors (see below), whose sum is σ = 1917920809728. Its totient is φ = 761079667200.

The previous prime is 1251421114357. The next prime is 1251421114421. The reversal of 1251421114405 is 5044111241521.

It is not a de Polignac number, because 1251421114405 - 2¹⁹ = 1251420590117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39623782 + ... + 39655351.

It is an arithmetic number, because the mean of its divisors is an integer number (59935025304).

Almost surely, 2^{1251421114405} is an apocalyptic number.

It is an amenable number.

1251421114405 is a deficient number, since it is larger than the sum of its proper divisors (666499695323).

1251421114405 is a wasteful number, since it uses less digits than its factorization.

1251421114405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79279197.

The product of its (nonzero) digits is 6400, while the sum is 31.

Adding to 1251421114405 its reverse (5044111241521), we get a palindrome (6295532355926).

The spelling of 1251421114405 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-one million, one hundred fourteen thousand, four hundred five".