1121220011221 has 4 divisors (see below), whose sum is σ = 1126247903872. Its totient is φ = 1116192118572.

The previous prime is 1121220011159. The next prime is 1121220011227. The reversal of 1121220011221 is 1221100221211.

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 a de Polignac number, because none of the positive numbers 2^k-1121220011221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121220011195 and 1121220011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220011227) 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, 2513945991 + ... + 2513946436.

It is an arithmetic number, because the mean of its divisors is an integer number (281561975968).

Almost surely, 2^{1121220011221} is an apocalyptic number.

It is an amenable number.

1121220011221 is a deficient number, since it is larger than the sum of its proper divisors (5027892651).

1121220011221 is an equidigital number, since it uses as much as digits as its factorization.

1121220011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5027892650.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121220011221 its reverse (1221100221211), we get a palindrome (2342320232432).

The spelling of 1121220011221 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, eleven thousand, two hundred twenty-one".