100121100212221 has 8 divisors (see below), whose sum is σ = 109520628822144. Its totient is φ = 90771173337120.

The previous prime is 100121100212153. The next prime is 100121100212249. The reversal of 100121100212221 is 122212001121001.

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 100121100212221 - 2¹⁵ = 100121100179453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121100212195 and 100121100212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121100212251) 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, 12400429480 + ... + 12400437553.

It is an arithmetic number, because the mean of its divisors is an integer number (13690078602768).

Almost surely, 2^{100121100212221} is an apocalyptic number.

100121100212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100121100212221 is a deficient number, since it is larger than the sum of its proper divisors (9399528609923).

100121100212221 is a wasteful number, since it uses less digits than its factorization.

100121100212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24800867411.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100121100212221 its reverse (122212001121001), we get a palindrome (222333101333222).

The spelling of 100121100212221 in words is "one hundred trillion, one hundred twenty-one billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".