145388221201 has 4 divisors (see below), whose sum is σ = 147852428400. Its totient is φ = 142924014004.

The previous prime is 145388221193. The next prime is 145388221241. The reversal of 145388221201 is 102122883541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145388221201 - 2³ = 145388221193 is a prime.

It is a super-2 number, since 2×145388221201² (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 (145388221241) 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, 1232103511 + ... + 1232103628.

It is an arithmetic number, because the mean of its divisors is an integer number (36963107100).

Almost surely, 2^145388221201 is an apocalyptic number.

It is an amenable number.

145388221201 is a deficient number, since it is larger than the sum of its proper divisors (2464207199).

145388221201 is an equidigital number, since it uses as much as digits as its factorization.

145388221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464207198.

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 145388221201 in words is "one hundred forty-five billion, three hundred eighty-eight million, two hundred twenty-one thousand, two hundred one".