123221051 has 4 divisors (see below), whose sum is σ = 128578512. Its totient is φ = 117863592.

The previous prime is 123221047. The next prime is 123221057. The reversal of 123221051 is 150122321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150122321 = 109 ⋅1377269.

It is not a de Polignac number, because 123221051 - 2² = 123221047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123221057) 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, 2678696 + ... + 2678741.

It is an arithmetic number, because the mean of its divisors is an integer number (32144628).

Almost surely, 2^123221051 is an apocalyptic number.

123221051 is a deficient number, since it is larger than the sum of its proper divisors (5357461).

123221051 is an equidigital number, since it uses as much as digits as its factorization.

123221051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5357460.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 123221051 is about 11100.4977816312. The cubic root of 123221051 is about 497.6167260600.

Adding to 123221051 its reverse (150122321), we get a palindrome (273343372).

The spelling of 123221051 in words is "one hundred twenty-three million, two hundred twenty-one thousand, fifty-one".