100121211221201 has 4 divisors (see below), whose sum is σ = 100325124075504. Its totient is φ = 99917298366900.

The previous prime is 100121211221191. The next prime is 100121211221233. The reversal of 100121211221201 is 102122112121001.

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 100121211221201 - 2⁶ = 100121211221137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100121211221201.

It is not an unprimeable number, because it can be changed into a prime (100121211221401) 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, 101956426415 + ... + 101956427396.

It is an arithmetic number, because the mean of its divisors is an integer number (25081281018876).

Almost surely, 2^{100121211221201} is an apocalyptic number.

It is an amenable number.

100121211221201 is a deficient number, since it is larger than the sum of its proper divisors (203912854303).

100121211221201 is an equidigital number, since it uses as much as digits as its factorization.

100121211221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203912854302.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100121211221201 its reverse (102122112121001), we get a palindrome (202243323342202).

The spelling of 100121211221201 in words is "one hundred trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-one thousand, two hundred one".