100121011122221 has 8 divisors (see below), whose sum is σ = 100159629270624. Its totient is φ = 100082393948880.

The previous prime is 100121011122191. The next prime is 100121011122227. The reversal of 100121011122221 is 122221110121001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100121011122221 - 2²² = 100121006927917 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 100121011122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121011122227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257258186 + ... + 257647076.

It is an arithmetic number, because the mean of its divisors is an integer number (12519953658828).

Almost surely, 2^{100121011122221} is an apocalyptic number.

It is an amenable number.

100121011122221 is a deficient number, since it is larger than the sum of its proper divisors (38618148403).

100121011122221 is an equidigital number, since it uses as much as digits as its factorization.

100121011122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487531.

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

Adding to 100121011122221 its reverse (122221110121001), we get a palindrome (222342121243222).

The spelling of 100121011122221 in words is "one hundred trillion, one hundred twenty-one billion, eleven million, one hundred twenty-two thousand, two hundred twenty-one".