121201220210101 has 4 divisors (see below), whose sum is σ = 125110936991104. Its totient is φ = 117291503429100.

The previous prime is 121201220210053. The next prime is 121201220210197. The reversal of 121201220210101 is 101012022102121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121201220210101 - 2¹¹ = 121201220208053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201220211101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954858390455 + ... + 1954858390516.

It is an arithmetic number, because the mean of its divisors is an integer number (31277734247776).

Almost surely, 2^{121201220210101} is an apocalyptic number.

It is an amenable number.

121201220210101 is a deficient number, since it is larger than the sum of its proper divisors (3909716781003).

121201220210101 is an equidigital number, since it uses as much as digits as its factorization.

121201220210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909716781002.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121201220210101 its reverse (101012022102121), we get a palindrome (222213242312222).

The spelling of 121201220210101 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty million, two hundred ten thousand, one hundred one".