145114111421 has 4 divisors (see below), whose sum is σ = 145123820700. Its totient is φ = 145104402144.

The previous prime is 145114111381. The next prime is 145114111469. The reversal of 145114111421 is 124111411541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113848900 + 145000262521 = 10670^2 + 380789^2 .

It is a cyclic number.

It is not a de Polignac number, because 145114111421 - 2⁶ = 145114111357 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 (145114113421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4832186 + ... + 4862123.

It is an arithmetic number, because the mean of its divisors is an integer number (36280955175).

Almost surely, 2^145114111421 is an apocalyptic number.

It is an amenable number.

145114111421 is a deficient number, since it is larger than the sum of its proper divisors (9709279).

145114111421 is an equidigital number, since it uses as much as digits as its factorization.

145114111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9709278.

The product of its digits is 640, while the sum is 26.

Adding to 145114111421 its reverse (124111411541), we get a palindrome (269225522962).

The spelling of 145114111421 in words is "one hundred forty-five billion, one hundred fourteen million, one hundred eleven thousand, four hundred twenty-one".