1201221201101 has 16 divisors (see below), whose sum is σ = 1338878779200. Its totient is φ = 1071012803328.

The previous prime is 1201221201097. The next prime is 1201221201107. The reversal of 1201221201101 is 1011021221021.

It is not a de Polignac number, because 1201221201101 - 2² = 1201221201097 is a prime.

It is a super-2 number, since 2×1201221201101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201221201107) 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, 9361091 + ... + 9488543.

It is an arithmetic number, because the mean of its divisors is an integer number (83679923700).

Almost surely, 2^{1201221201101} is an apocalyptic number.

It is an amenable number.

1201221201101 is a deficient number, since it is larger than the sum of its proper divisors (137657578099).

1201221201101 is a wasteful number, since it uses less digits than its factorization.

1201221201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156668.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201221201101 its reverse (1011021221021), we get a palindrome (2212242422122).

The spelling of 1201221201101 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred one thousand, one hundred one".