14121505421 has 2 divisors, whose sum is σ = 14121505422. Its totient is φ = 14121505420.

The previous prime is 14121505399. The next prime is 14121505469. The reversal of 14121505421 is 12450512141.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8695562500 + 5425942921 = 93250^2 + 73661^2 .

It is an emirp because it is prime and its reverse (12450512141) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14121505421 - 2⁶ = 14121505357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14121505621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7060752710 + 7060752711.

It is an arithmetic number, because the mean of its divisors is an integer number (7060752711).

Almost surely, 2^14121505421 is an apocalyptic number.

It is an amenable number.

14121505421 is a deficient number, since it is larger than the sum of its proper divisors (1).

14121505421 is an equidigital number, since it uses as much as digits as its factorization.

14121505421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 26.

The spelling of 14121505421 in words is "fourteen billion, one hundred twenty-one million, five hundred five thousand, four hundred twenty-one".