1211122110201 has 4 divisors (see below), whose sum is σ = 1614829480272. Its totient is φ = 807414740132.

The previous prime is 1211122110197. The next prime is 1211122110251. The reversal of 1211122110201 is 1020112211121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1211122110201 - 2² = 1211122110197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211122110251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201853685031 + ... + 201853685036.

It is an arithmetic number, because the mean of its divisors is an integer number (403707370068).

Almost surely, 2^{1211122110201} is an apocalyptic number.

It is an amenable number.

1211122110201 is a deficient number, since it is larger than the sum of its proper divisors (403707370071).

1211122110201 is an equidigital number, since it uses as much as digits as its factorization.

1211122110201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403707370070.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211122110201 its reverse (1020112211121), we get a palindrome (2231234321322).

The spelling of 1211122110201 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, two hundred one".