21224151223 has 8 divisors (see below), whose sum is σ = 23170401936. Its totient is φ = 19280697600.

The previous prime is 21224151167. The next prime is 21224151241. The reversal of 21224151223 is 32215142212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21224151223 - 2²¹ = 21222054071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224151253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683386 + ... + 713767.

It is an arithmetic number, because the mean of its divisors is an integer number (2896300242).

Almost surely, 2^21224151223 is an apocalyptic number.

21224151223 is a deficient number, since it is larger than the sum of its proper divisors (1946250713).

21224151223 is a wasteful number, since it uses less digits than its factorization.

21224151223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398545.

The product of its digits is 1920, while the sum is 25.

Adding to 21224151223 its reverse (32215142212), we get a palindrome (53439293435).

The spelling of 21224151223 in words is "twenty-one billion, two hundred twenty-four million, one hundred fifty-one thousand, two hundred twenty-three".