1122121100121 has 16 divisors (see below), whose sum is σ = 1709924668800. Its totient is φ = 641202363648.

The previous prime is 1122121100119. The next prime is 1122121100143. The reversal of 1122121100121 is 1210011212211.

It is a happy number.

It is not a de Polignac number, because 1122121100121 - 2¹ = 1122121100119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1122121100121.

It is not an unprimeable number, because it can be changed into a prime (1122121150121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1158915 + ... + 1894023.

It is an arithmetic number, because the mean of its divisors is an integer number (106870291800).

Almost surely, 2^{1122121100121} is an apocalyptic number.

It is an amenable number.

1122121100121 is a deficient number, since it is larger than the sum of its proper divisors (587803568679).

1122121100121 is an equidigital number, since it uses as much as digits as its factorization.

1122121100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807808.

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

Adding to 1122121100121 its reverse (1210011212211), we get a palindrome (2332132312332).

The spelling of 1122121100121 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-one".