1201110101221 has 4 divisors (see below), whose sum is σ = 1201112791200. Its totient is φ = 1201107411244.

The previous prime is 1201110101189. The next prime is 1201110101227. The reversal of 1201110101221 is 1221010111021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201110101221 - 2⁵ = 1201110101189 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 (1201110101227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497011 + ... + 1627648.

It is an arithmetic number, because the mean of its divisors is an integer number (300278197800).

Almost surely, 2^{1201110101221} is an apocalyptic number.

It is an amenable number.

1201110101221 is a deficient number, since it is larger than the sum of its proper divisors (2689979).

1201110101221 is an equidigital number, since it uses as much as digits as its factorization.

1201110101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689978.

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

Adding to 1201110101221 its reverse (1221010111021), we get a palindrome (2422120212242).

The spelling of 1201110101221 in words is "one trillion, two hundred one billion, one hundred ten million, one hundred one thousand, two hundred twenty-one".