1211222202020 has 24 divisors (see below), whose sum is σ = 2552952490368. Its totient is φ = 482701096800.

The previous prime is 1211222201977. The next prime is 1211222202061. The reversal of 1211222202020 is 202022221121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211222202020.

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, 111730946 + ... + 111741785.

It is an arithmetic number, because the mean of its divisors is an integer number (106373020432).

Almost surely, 2^{1211222202020} is an apocalyptic number.

1211222202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211222202020 is an abundant number, since it is smaller than the sum of its proper divisors (1341730288348).

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

1211222202020 is a wasteful number, since it uses less digits than its factorization.

1211222202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223473011 (or 223473009 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1211222202020 its reverse (202022221121), we get a palindrome (1413244423141).

The spelling of 1211222202020 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred two thousand, twenty".