1201201100121 has 16 divisors (see below), whose sum is σ = 1756254467520. Its totient is φ = 724228638720.

The previous prime is 1201201100119. The next prime is 1201201100129. The reversal of 1201201100121 is 1210011021021.

It is not a de Polignac number, because 1201201100121 - 2¹ = 1201201100119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1201201100097 and 1201201100106.

It is not an unprimeable number, because it can be changed into a prime (1201201100129) 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, 94294236 + ... + 94306973.

It is an arithmetic number, because the mean of its divisors is an integer number (109765904220).

Almost surely, 2^{1201201100121} is an apocalyptic number.

1201201100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201201100121 is a deficient number, since it is larger than the sum of its proper divisors (555053367399).

1201201100121 is a wasteful number, since it uses less digits than its factorization.

1201201100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188601416.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201201100121 its reverse (1210011021021), we get a palindrome (2411212121142).

The spelling of 1201201100121 in words is "one trillion, two hundred one billion, two hundred one million, one hundred thousand, one hundred twenty-one".