1211202200021 has 16 divisors (see below), whose sum is σ = 1326360562560. Its totient is φ = 1096886201280.

The previous prime is 1211202200011. The next prime is 1211202200069. The reversal of 1211202200021 is 1200022021121.

It is a cyclic number.

It is not a de Polignac number, because 1211202200021 - 2⁶ = 1211202199957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211202199969 and 1211202200005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211202200011) 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 15 ways as a sum of consecutive naturals, for example, 44244080 + ... + 44271446.

It is an arithmetic number, because the mean of its divisors is an integer number (82897535160).

Almost surely, 2^{1211202200021} is an apocalyptic number.

1211202200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211202200021 is a deficient number, since it is larger than the sum of its proper divisors (115158362539).

1211202200021 is a wasteful number, since it uses less digits than its factorization.

1211202200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42604.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1211202200021 its reverse (1200022021121), we get a palindrome (2411224221142).

The spelling of 1211202200021 in words is "one trillion, two hundred eleven billion, two hundred two million, two hundred thousand, twenty-one".