100121010221121 has 4 divisors (see below), whose sum is σ = 133494680294832. Its totient is φ = 66747340147412.

The previous prime is 100121010221093. The next prime is 100121010221129. The reversal of 100121010221121 is 121122010121001.

It is a happy number.

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 100121010221121 - 2⁷ = 100121010220993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100121010221121.

It is not an unprimeable number, because it can be changed into a prime (100121010221129) 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, 16686835036851 + ... + 16686835036856.

It is an arithmetic number, because the mean of its divisors is an integer number (33373670073708).

Almost surely, 2^{100121010221121} is an apocalyptic number.

It is an amenable number.

100121010221121 is a deficient number, since it is larger than the sum of its proper divisors (33373670073711).

100121010221121 is an equidigital number, since it uses as much as digits as its factorization.

100121010221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33373670073710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100121010221121 its reverse (121122010121001), we get a palindrome (221243020342122).

The spelling of 100121010221121 in words is "one hundred trillion, one hundred twenty-one billion, ten million, two hundred twenty-one thousand, one hundred twenty-one".