1211222210201 has 16 divisors (see below), whose sum is σ = 1279289679360. Its totient is φ = 1143588326400.

The previous prime is 1211222210167. The next prime is 1211222210203. The reversal of 1211222210201 is 1020122221121.

It is a cyclic number.

It is not a de Polignac number, because 1211222210201 - 2²² = 1211218015897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211222210201.

It is not an unprimeable number, because it can be changed into a prime (1211222210203) 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, 28895480 + ... + 28937366.

It is an arithmetic number, because the mean of its divisors is an integer number (79955604960).

Almost surely, 2^{1211222210201} is an apocalyptic number.

It is an amenable number.

1211222210201 is a deficient number, since it is larger than the sum of its proper divisors (68067469159).

1211222210201 is a wasteful number, since it uses less digits than its factorization.

1211222210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47024.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1211222210201 its reverse (1020122221121), we get a palindrome (2231344431322).

The spelling of 1211222210201 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred ten thousand, two hundred one".