1201112231221 has 4 divisors (see below), whose sum is σ = 1372699692832. Its totient is φ = 1029524769612.

The previous prime is 1201112231213. The next prime is 1201112231251. The reversal of 1201112231221 is 1221322111021.

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 1201112231221 - 2³ = 1201112231213 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 (1201112231251) 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, 85793730795 + ... + 85793730808.

It is an arithmetic number, because the mean of its divisors is an integer number (343174923208).

Almost surely, 2^{1201112231221} is an apocalyptic number.

It is an amenable number.

1201112231221 is a deficient number, since it is larger than the sum of its proper divisors (171587461611).

1201112231221 is an equidigital number, since it uses as much as digits as its factorization.

1201112231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171587461610.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1201112231221 its reverse (1221322111021), we get a palindrome (2422434342242).

The spelling of 1201112231221 in words is "one trillion, two hundred one billion, one hundred twelve million, two hundred thirty-one thousand, two hundred twenty-one".