148222021 has 4 divisors (see below), whose sum is σ = 156023200. Its totient is φ = 140420844.

The previous prime is 148222013. The next prime is 148222027. The reversal of 148222021 is 120222841.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120222841 = 331 ⋅363211.

It is a cyclic number.

It is not a de Polignac number, because 148222021 - 2³ = 148222013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 148221983 and 148222001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148222027) 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, 3900561 + ... + 3900598.

It is an arithmetic number, because the mean of its divisors is an integer number (39005800).

Almost surely, 2^148222021 is an apocalyptic number.

It is an amenable number.

148222021 is a deficient number, since it is larger than the sum of its proper divisors (7801179).

148222021 is an equidigital number, since it uses as much as digits as its factorization.

148222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7801178.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 148222021 is about 12174.6466478498. The cubic root of 148222021 is about 529.2216187571.

Adding to 148222021 its reverse (120222841), we get a palindrome (268444862).

The spelling of 148222021 in words is "one hundred forty-eight million, two hundred twenty-two thousand, twenty-one".