1121221100121 has 8 divisors (see below), whose sum is σ = 1511758787040. Its totient is φ = 739082073312.

The previous prime is 1121221100119. The next prime is 1121221100159. The reversal of 1121221100121 is 1210011221211.

It is a happy number.

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

It is not a de Polignac number, because 1121221100121 - 2¹ = 1121221100119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121221100121.

It is not an unprimeable number, because it can be changed into a prime (1121221100221) 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, 2099664715 + ... + 2099665248.

It is an arithmetic number, because the mean of its divisors is an integer number (188969848380).

Almost surely, 2^{1121221100121} is an apocalyptic number.

It is an amenable number.

1121221100121 is a deficient number, since it is larger than the sum of its proper divisors (390537686919).

1121221100121 is an equidigital number, since it uses as much as digits as its factorization.

1121221100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199330055.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121221100121 its reverse (1210011221211), we get a palindrome (2331232321332).

The spelling of 1121221100121 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-one".