1211102221101 has 8 divisors (see below), whose sum is σ = 1615863245280. Its totient is φ = 806871338832.

The previous prime is 1211102221079. The next prime is 1211102221117. The reversal of 1211102221101 is 1011222011121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211102221101 - 2⁷ = 1211102220973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211102221151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132530146 + ... + 132539283.

It is an arithmetic number, because the mean of its divisors is an integer number (201982905660).

Almost surely, 2^{1211102221101} is an apocalyptic number.

It is an amenable number.

1211102221101 is a deficient number, since it is larger than the sum of its proper divisors (404761024179).

1211102221101 is a wasteful number, since it uses less digits than its factorization.

1211102221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265070955.

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

Adding to 1211102221101 its reverse (1011222011121), we get a palindrome (2222324232222).

The spelling of 1211102221101 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred twenty-one thousand, one hundred one".