121201210133 has 4 divisors (see below), whose sum is σ = 128330693100. Its totient is φ = 114071727168.

The previous prime is 121201210127. The next prime is 121201210139. The reversal of 121201210133 is 331012102121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121201210127) and next prime (121201210139).

It can be written as a sum of positive squares in 2 ways, for example, as 100208967364 + 20992242769 = 316558^2 + 144887^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201210133 - 2³⁰ = 120127468309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7129482949 = 121201210133 / (1 + 2 + 1 + 2 + 0 + 1 + 2 + 1 + 0 + 1 + 3 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201210139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3564741458 + ... + 3564741491.

It is an arithmetic number, because the mean of its divisors is an integer number (32082673275).

Almost surely, 2^121201210133 is an apocalyptic number.

It is an amenable number.

121201210133 is a deficient number, since it is larger than the sum of its proper divisors (7129482967).

121201210133 is an equidigital number, since it uses as much as digits as its factorization.

121201210133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129482966.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121201210133 its reverse (331012102121), we get a palindrome (452213312254).

The spelling of 121201210133 in words is "one hundred twenty-one billion, two hundred one million, two hundred ten thousand, one hundred thirty-three".