145321131211 has 4 divisors (see below), whose sum is σ = 146953953000. Its totient is φ = 143688309424.

The previous prime is 145321131187. The next prime is 145321131233. The reversal of 145321131211 is 112131123541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112131123541 = 31307 ⋅3581663.

It is a cyclic number.

It is not a de Polignac number, because 145321131211 - 2¹³ = 145321123019 is a prime.

It is a super-2 number, since 2×145321131211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145321831211) 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, 816410761 + ... + 816410938.

It is an arithmetic number, because the mean of its divisors is an integer number (36738488250).

Almost surely, 2^145321131211 is an apocalyptic number.

145321131211 is a deficient number, since it is larger than the sum of its proper divisors (1632821789).

145321131211 is an equidigital number, since it uses as much as digits as its factorization.

145321131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632821788.

The product of its digits is 720, while the sum is 25.

Adding to 145321131211 its reverse (112131123541), we get a palindrome (257452254752).

The spelling of 145321131211 in words is "one hundred forty-five billion, three hundred twenty-one million, one hundred thirty-one thousand, two hundred eleven".