1224402421220 has 24 divisors (see below), whose sum is σ = 2804994638208. Its totient is φ = 445237244000.

The previous prime is 1224402421213. The next prime is 1224402421223. The reversal of 1224402421220 is 221242044221.

It is a super-2 number, since 2×1224402421220² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1224402421220.

It is not an unprimeable number, because it can be changed into a prime (1224402421223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2782732556 + ... + 2782732995.

It is an arithmetic number, because the mean of its divisors is an integer number (116874776592).

Almost surely, 2^{1224402421220} is an apocalyptic number.

1224402421220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224402421220 is an abundant number, since it is smaller than the sum of its proper divisors (1580592216988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1224402421220 is a wasteful number, since it uses less digits than its factorization.

1224402421220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565465571 (or 5565465569 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 1224402421220 its reverse (221242044221), we get a palindrome (1445644465441).

The spelling of 1224402421220 in words is "one trillion, two hundred twenty-four billion, four hundred two million, four hundred twenty-one thousand, two hundred twenty".