1220021053530 has 16 divisors (see below), whose sum is σ = 2928050528544. Its totient is φ = 325338947600.

The previous prime is 1220021053507. The next prime is 1220021053561. The reversal of 1220021053530 is 353501200221.

It is a happy number.

It is a super-3 number, since 3×1220021053530³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1220021053530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20333684196 + ... + 20333684255.

It is an arithmetic number, because the mean of its divisors is an integer number (183003158034).

Almost surely, 2^{1220021053530} is an apocalyptic number.

1220021053530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220021053530 is an abundant number, since it is smaller than the sum of its proper divisors (1708029475014).

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

1220021053530 is a wasteful number, since it uses less digits than its factorization.

1220021053530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40667368461.

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 1220021053530 its reverse (353501200221), we get a palindrome (1573522253751).

The spelling of 1220021053530 in words is "one trillion, two hundred twenty billion, twenty-one million, fifty-three thousand, five hundred thirty".