1224051021 has 12 divisors (see below), whose sum is σ = 1833558272. Its totient is φ = 816033852.

The previous prime is 1224051013. The next prime is 1224051047. The reversal of 1224051021 is 1201504221.

It is not a de Polignac number, because 1224051021 - 2³ = 1224051013 is a prime.

It is a super-2 number, since 2×1224051021² = 2996601804022284882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1224050985 and 1224051003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224051001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2518381 + ... + 2518866.

Almost surely, 2^1224051021 is an apocalyptic number.

It is an amenable number.

1224051021 is a deficient number, since it is larger than the sum of its proper divisors (609507251).

1224051021 is an frugal number, since it uses more digits than its factorization.

1224051021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037262 (or 5037250 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1224051021 is about 34986.4405305827. The cubic root of 1224051021 is about 1069.7111110512.

Adding to 1224051021 its reverse (1201504221), we get a palindrome (2425555242).

The spelling of 1224051021 in words is "one billion, two hundred twenty-four million, fifty-one thousand, twenty-one".