1201110112221 has 32 divisors (see below), whose sum is σ = 1755260928000. Its totient is φ = 727294928640.

The previous prime is 1201110112219. The next prime is 1201110112309. The reversal of 1201110112221 is 1222110111021.

It is a happy number.

It is not a de Polignac number, because 1201110112221 - 2¹ = 1201110112219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201110112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201110182221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490521 + ... + 1625678.

It is an arithmetic number, because the mean of its divisors is an integer number (54851904000).

Almost surely, 2^{1201110112221} is an apocalyptic number.

It is an amenable number.

1201110112221 is a deficient number, since it is larger than the sum of its proper divisors (554150815779).

1201110112221 is a wasteful number, since it uses less digits than its factorization.

1201110112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116609.

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

Adding to 1201110112221 its reverse (1222110111021), we get a palindrome (2423220223242).

The spelling of 1201110112221 in words is "one trillion, two hundred one billion, one hundred ten million, one hundred twelve thousand, two hundred twenty-one".