1224441402421 has 4 divisors (see below), whose sum is σ = 1226997648000. Its totient is φ = 1221885156844.

The previous prime is 1224441402413. The next prime is 1224441402533. The reversal of 1224441402421 is 1242041444221.

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 a cyclic number.

It is not a de Polignac number, because 1224441402421 - 2³ = 1224441402413 is a prime.

It is a super-2 number, since 2×1224441402421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224441403421) 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, 1278122071 + ... + 1278123028.

It is an arithmetic number, because the mean of its divisors is an integer number (306749412000).

Almost surely, 2^{1224441402421} is an apocalyptic number.

It is an amenable number.

1224441402421 is a deficient number, since it is larger than the sum of its proper divisors (2556245579).

1224441402421 is an equidigital number, since it uses as much as digits as its factorization.

1224441402421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556245578.

The product of its (nonzero) digits is 16384, while the sum is 31.

Adding to 1224441402421 its reverse (1242041444221), we get a palindrome (2466482846642).

The spelling of 1224441402421 in words is "one trillion, two hundred twenty-four billion, four hundred forty-one million, four hundred two thousand, four hundred twenty-one".