145111151421 has 12 divisors (see below), whose sum is σ = 209735938620. Its totient is φ = 96680332800.

The previous prime is 145111151389. The next prime is 145111151441. The reversal of 145111151421 is 124151111541.

145111151421 is a `hidden beast` number, since 1 + 4 + 511 + 1 + 1 + 5 + 142 + 1 = 666.

145111151421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133276104900 + 11835046521 = 365070^2 + 108789^2 .

It is not a de Polignac number, because 145111151421 - 2⁵ = 145111151389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145111151441) 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 11 ways as a sum of consecutive naturals, for example, 5021026 + ... + 5049843.

It is an arithmetic number, because the mean of its divisors is an integer number (17477994885).

Almost surely, 2^145111151421 is an apocalyptic number.

It is an amenable number.

145111151421 is a deficient number, since it is larger than the sum of its proper divisors (64624787199).

145111151421 is a wasteful number, since it uses less digits than its factorization.

145111151421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10072476 (or 10072473 counting only the distinct ones).

The product of its digits is 800, while the sum is 27.

Adding to 145111151421 its reverse (124151111541), we get a palindrome (269262262962).

The spelling of 145111151421 in words is "one hundred forty-five billion, one hundred eleven million, one hundred fifty-one thousand, four hundred twenty-one".