1251421140103 has 8 divisors (see below), whose sum is σ = 1294673497200. Its totient is φ = 1208175443328.

The previous prime is 1251421140091. The next prime is 1251421140169. The reversal of 1251421140103 is 3010411241521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1251421140103 - 2¹³ = 1251421131911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251421146103) 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 7 ways as a sum of consecutive naturals, for example, 1281301 + ... + 2035822.

It is an arithmetic number, because the mean of its divisors is an integer number (161834187150).

Almost surely, 2^{1251421140103} is an apocalyptic number.

1251421140103 is a deficient number, since it is larger than the sum of its proper divisors (43252357097).

1251421140103 is a wasteful number, since it uses less digits than its factorization.

1251421140103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330161.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 1251421140103 its reverse (3010411241521), we get a palindrome (4261832381624).

The spelling of 1251421140103 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-one million, one hundred forty thousand, one hundred three".