1211210222201 has 16 divisors (see below), whose sum is σ = 1385004411648. Its totient is φ = 1037607278400.

The previous prime is 1211210222191. The next prime is 1211210222213. The reversal of 1211210222201 is 1022220121121.

It is a de Polignac number, because none of the positive numbers 2^k-1211210222201 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 1211210222201.

It is not an unprimeable number, because it can be changed into a prime (1211210222231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157234916 + ... + 157242618.

It is an arithmetic number, because the mean of its divisors is an integer number (86562775728).

Almost surely, 2^{1211210222201} is an apocalyptic number.

It is an amenable number.

1211210222201 is a deficient number, since it is larger than the sum of its proper divisors (173794189447).

1211210222201 is an equidigital number, since it uses as much as digits as its factorization.

1211210222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17192.

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

Adding to 1211210222201 its reverse (1022220121121), we get a palindrome (2233430343322).

The spelling of 1211210222201 in words is "one trillion, two hundred eleven billion, two hundred ten million, two hundred twenty-two thousand, two hundred one".