1224101021 has 16 divisors (see below), whose sum is σ = 1441758528. Its totient is φ = 1024608000.

The previous prime is 1224101003. The next prime is 1224101027. The reversal of 1224101021 is 1201014221.

It is a happy number.

It is not a de Polignac number, because 1224101021 - 2⁶ = 1224100957 is a prime.

It is a super-2 number, since 2×1224101021² = 2996846619226484882, 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 = 1224100987 and 1224101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224101027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46670 + ... + 68016.

It is an arithmetic number, because the mean of its divisors is an integer number (90109908).

Almost surely, 2^1224101021 is an apocalyptic number.

1224101021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1224101021 is a deficient number, since it is larger than the sum of its proper divisors (217657507).

1224101021 is a wasteful number, since it uses less digits than its factorization.

1224101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21772.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1224101021 is about 34987.1550858311. The cubic root of 1224101021 is about 1069.7256760289.

Adding to 1224101021 its reverse (1201014221), we get a palindrome (2425115242).

The spelling of 1224101021 in words is "one billion, two hundred twenty-four million, one hundred one thousand, twenty-one".