124621221 has 4 divisors (see below), whose sum is σ = 166161632. Its totient is φ = 83080812.

The previous prime is 124621219. The next prime is 124621229. The reversal of 124621221 is 122126421.

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 not a de Polignac number, because 124621221 - 2¹ = 124621219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124621229) 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, 20770201 + ... + 20770206.

It is an arithmetic number, because the mean of its divisors is an integer number (41540408).

Almost surely, 2^124621221 is an apocalyptic number.

It is an amenable number.

124621221 is a deficient number, since it is larger than the sum of its proper divisors (41540411).

124621221 is an equidigital number, since it uses as much as digits as its factorization.

124621221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41540410.

The product of its digits is 384, while the sum is 21.

The square root of 124621221 is about 11163.3875235074. The cubic root of 124621221 is about 499.4944503447.

Adding to 124621221 its reverse (122126421), we get a palindrome (246747642).

The spelling of 124621221 in words is "one hundred twenty-four million, six hundred twenty-one thousand, two hundred twenty-one".