1201113112221 has 160 divisors (see below), whose sum is σ = 2075266144512. Its totient is φ = 685163888640.

The previous prime is 1201113112217. The next prime is 1201113112237. The reversal of 1201113112221 is 1222113111021.

It is a happy number.

1201113112221 is a `hidden beast` number, since 1 + 20 + 111 + 311 + 2 + 221 = 666.

It is not a de Polignac number, because 1201113112221 - 2² = 1201113112217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201113112194 and 1201113112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201113112271) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1006800001 + ... + 1006801193.

Almost surely, 2^{1201113112221} is an apocalyptic number.

1201113112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201113112221 is a deficient number, since it is larger than the sum of its proper divisors (874153032291).

1201113112221 is a wasteful number, since it uses less digits than its factorization.

1201113112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985 (or 1976 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1201113112221 its reverse (1222113111021), we get a palindrome (2423226223242).

The spelling of 1201113112221 in words is "one trillion, two hundred one billion, one hundred thirteen million, one hundred twelve thousand, two hundred twenty-one".