201100202120121 has 4 divisors (see below), whose sum is σ = 268133602826832. Its totient is φ = 134066801413412.

The previous prime is 201100202120053. The next prime is 201100202120281. The reversal of 201100202120121 is 121021202001102.

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 201100202120121 - 2¹⁹ = 201100201595833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201100202120121.

It is not an unprimeable number, because it can be changed into a prime (201100202120021) 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, 33516700353351 + ... + 33516700353356.

It is an arithmetic number, because the mean of its divisors is an integer number (67033400706708).

Almost surely, 2^{201100202120121} is an apocalyptic number.

It is an amenable number.

201100202120121 is a deficient number, since it is larger than the sum of its proper divisors (67033400706711).

201100202120121 is an equidigital number, since it uses as much as digits as its factorization.

201100202120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67033400706710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201100202120121 its reverse (121021202001102), we get a palindrome (322121404121223).

The spelling of 201100202120121 in words is "two hundred one trillion, one hundred billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".