100121201100221 has 4 divisors (see below), whose sum is σ = 114424229828832. Its totient is φ = 85818172371612.

The previous prime is 100121201100127. The next prime is 100121201100233. The reversal of 100121201100221 is 122001102121001.

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 100121201100221 - 2³⁰ = 100120127358397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100121201100196 and 100121201100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121201100421) 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, 7151514364295 + ... + 7151514364308.

It is an arithmetic number, because the mean of its divisors is an integer number (28606057457208).

Almost surely, 2^{100121201100221} is an apocalyptic number.

It is an amenable number.

100121201100221 is a deficient number, since it is larger than the sum of its proper divisors (14303028728611).

100121201100221 is an equidigital number, since it uses as much as digits as its factorization.

100121201100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14303028728610.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100121201100221 its reverse (122001102121001), we get a palindrome (222122303221222).

The spelling of 100121201100221 in words is "one hundred trillion, one hundred twenty-one billion, two hundred one million, one hundred thousand, two hundred twenty-one".