1201221110101 has 8 divisors (see below), whose sum is σ = 1257908791104. Its totient is φ = 1144905152160.

The previous prime is 1201221110087. The next prime is 1201221110123. The reversal of 1201221110101 is 1010111221021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1201221110101 - 2²¹ = 1201219012949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201221110171) 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, 92924151 + ... + 92937076.

It is an arithmetic number, because the mean of its divisors is an integer number (157238598888).

Almost surely, 2^{1201221110101} is an apocalyptic number.

It is an amenable number.

1201221110101 is a deficient number, since it is larger than the sum of its proper divisors (56687681003).

1201221110101 is a wasteful number, since it uses less digits than its factorization.

1201221110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185861531.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1201221110101 its reverse (1010111221021), we get a palindrome (2211332331122).

The spelling of 1201221110101 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one hundred ten thousand, one hundred one".