1220211030020 has 12 divisors (see below), whose sum is σ = 2562443163084. Its totient is φ = 488084412000.

The previous prime is 1220211029981. The next prime is 1220211030029. The reversal of 1220211030020 is 200301120221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 130771917376 + 1089439112644 = 361624^2 + 1043762^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220211029977 and 1220211030004.

It is not an unprimeable number, because it can be changed into a prime (1220211030029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30505275731 + ... + 30505275770.

It is an arithmetic number, because the mean of its divisors is an integer number (213536930257).

Almost surely, 2^{1220211030020} is an apocalyptic number.

1220211030020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220211030020 is an abundant number, since it is smaller than the sum of its proper divisors (1342232133064).

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

1220211030020 is a wasteful number, since it uses less digits than its factorization.

1220211030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61010551510 (or 61010551508 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1220211030020 its reverse (200301120221), we get a palindrome (1420512150241).

The spelling of 1220211030020 in words is "one trillion, two hundred twenty billion, two hundred eleven million, thirty thousand, twenty".