120011221100121 has 16 divisors (see below), whose sum is σ = 172324174210944. Its totient is φ = 73852900758144.

The previous prime is 120011221100107. The next prime is 120011221100129. The reversal of 120011221100121 is 121001122110021.

It is a happy number.

It is not a de Polignac number, because 120011221100121 - 2³¹ = 120009073616473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120011221100121.

It is not an unprimeable number, because it can be changed into a prime (120011221100129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16645420 + ... + 22739666.

It is an arithmetic number, because the mean of its divisors is an integer number (10770260888184).

Almost surely, 2^{120011221100121} is an apocalyptic number.

It is an amenable number.

120011221100121 is a deficient number, since it is larger than the sum of its proper divisors (52312953110823).

120011221100121 is a wasteful number, since it uses less digits than its factorization.

120011221100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599200.

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

Adding to 120011221100121 its reverse (121001122110021), we get a palindrome (241012343210142).

The spelling of 120011221100121 in words is "one hundred twenty trillion, eleven billion, two hundred twenty-one million, one hundred thousand, one hundred twenty-one".