1211110122201 has 16 divisors (see below), whose sum is σ = 1845523835904. Its totient is φ = 692054415504.

The previous prime is 1211110122199. The next prime is 1211110122281. The reversal of 1211110122201 is 1022210111121.

It is a happy number.

It is not a de Polignac number, because 1211110122201 - 2¹ = 1211110122199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211110122281) 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, 1659540 + ... + 2275146.

It is an arithmetic number, because the mean of its divisors is an integer number (115345239744).

Almost surely, 2^{1211110122201} is an apocalyptic number.

It is an amenable number.

1211110122201 is a deficient number, since it is larger than the sum of its proper divisors (634413713703).

1211110122201 is an equidigital number, since it uses as much as digits as its factorization.

1211110122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709300.

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

Adding to 1211110122201 its reverse (1022210111121), we get a palindrome (2233320233322).

The spelling of 1211110122201 in words is "one trillion, two hundred eleven billion, one hundred ten million, one hundred twenty-two thousand, two hundred one".