1121101221221 has 8 divisors (see below), whose sum is σ = 1136617173120. Its totient is φ = 1105618389408.

The previous prime is 1121101221209. The next prime is 1121101221223. The reversal of 1121101221221 is 1221221011211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121101221221 - 2⁶ = 1121101221157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121101221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121101221223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8211851 + ... + 8347256.

It is an arithmetic number, because the mean of its divisors is an integer number (142077146640).

Almost surely, 2^{1121101221221} is an apocalyptic number.

It is an amenable number.

1121101221221 is a deficient number, since it is larger than the sum of its proper divisors (15515951899).

1121101221221 is an equidigital number, since it uses as much as digits as its factorization.

1121101221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16560043.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1121101221221 its reverse (1221221011211), we get a palindrome (2342322232432).

It can be divided in two parts, 112110 and 1221221, that added together give a palindrome (1333331).

The spelling of 1121101221221 in words is "one trillion, one hundred twenty-one billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty-one".