1121011220121 has 16 divisors (see below), whose sum is σ = 1609676671680. Its totient is φ = 689844686400.

The previous prime is 1121011220101. The next prime is 1121011220129. The reversal of 1121011220121 is 1210221101211.

It is a happy number.

It is not a de Polignac number, because 1121011220121 - 2⁶ = 1121011220057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121011220121.

It is not an unprimeable number, because it can be changed into a prime (1121011220129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5096895 + ... + 5312283.

It is an arithmetic number, because the mean of its divisors is an integer number (100604791980).

Almost surely, 2^{1121011220121} is an apocalyptic number.

It is an amenable number.

1121011220121 is a deficient number, since it is larger than the sum of its proper divisors (488665451559).

1121011220121 is a wasteful number, since it uses less digits than its factorization.

1121011220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348856.

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

Adding to 1121011220121 its reverse (1210221101211), we get a palindrome (2331232321332).

The spelling of 1121011220121 in words is "one trillion, one hundred twenty-one billion, eleven million, two hundred twenty thousand, one hundred twenty-one".