1224021020 has 48 divisors (see below), whose sum is σ = 2615433408. Its totient is φ = 481113600.

The previous prime is 1224020977. The next prime is 1224021037. The reversal of 1224021020 is 201204221.

It is a junction number, because it is equal to n+sod(n) for n = 1224020986 and 1224021004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274529 + ... + 278951.

It is an arithmetic number, because the mean of its divisors is an integer number (54488196).

Almost surely, 2^1224021020 is an apocalyptic number.

1224021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224021020 is an abundant number, since it is smaller than the sum of its proper divisors (1391412388).

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

1224021020 is a wasteful number, since it uses less digits than its factorization.

1224021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4670 (or 4668 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1224021020 is about 34986.0117761370. The cubic root of 1224021020 is about 1069.7023715830.

Adding to 1224021020 its reverse (201204221), we get a palindrome (1425225241).

The spelling of 1224021020 in words is "one billion, two hundred twenty-four million, twenty-one thousand, twenty".