1242021222220 has 24 divisors (see below), whose sum is σ = 2608310577600. Its totient is φ = 496795915392.

The previous prime is 1242021222173. The next prime is 1242021222229. The reversal of 1242021222220 is 222221202421.

It is a junction number, because it is equal to n+sod(n) for n = 1242021222191 and 1242021222200.

It is not an unprimeable number, because it can be changed into a prime (1242021222229) 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, 45616 + ... + 1576744.

It is an arithmetic number, because the mean of its divisors is an integer number (108679607400).

Almost surely, 2^{1242021222220} is an apocalyptic number.

1242021222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242021222220 is an abundant number, since it is smaller than the sum of its proper divisors (1366289355380).

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

1242021222220 is a wasteful number, since it uses less digits than its factorization.

1242021222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571697 (or 1571695 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 1242021222220 its reverse (222221202421), we get a palindrome (1464242424641).

The spelling of 1242021222220 in words is "one trillion, two hundred forty-two billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".