1211202203020 has 48 divisors (see below), whose sum is σ = 2610818271936. Its totient is φ = 471820320000.

The previous prime is 1211202202979. The next prime is 1211202203047. The reversal of 1211202203020 is 203022021121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211202202985 and 1211202203003.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4791576 + ... + 5038015.

It is an arithmetic number, because the mean of its divisors is an integer number (54392047332).

Almost surely, 2^{1211202203020} is an apocalyptic number.

1211202203020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211202203020 is an abundant number, since it is smaller than the sum of its proper divisors (1399616068916).

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

1211202203020 is a wasteful number, since it uses less digits than its factorization.

1211202203020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9829762 (or 9829760 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1211202203020 its reverse (203022021121), we get a palindrome (1414224224141).

The spelling of 1211202203020 in words is "one trillion, two hundred eleven billion, two hundred two million, two hundred three thousand, twenty".