100121112222021 has 12 divisors (see below), whose sum is σ = 157766601077280. Its totient is φ = 60679461952680.

The previous prime is 100121112222007. The next prime is 100121112222041. The reversal of 100121112222021 is 120222211121001.

It is not a de Polignac number, because 100121112222021 - 2⁹ = 100121112221509 is a prime.

It is a super-2 number, since 2×100121112222021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100121112221985 and 100121112222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121112222041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 505662182841 + ... + 505662183038.

It is an arithmetic number, because the mean of its divisors is an integer number (13147216756440).

Almost surely, 2^{100121112222021} is an apocalyptic number.

100121112222021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100121112222021 is a deficient number, since it is larger than the sum of its proper divisors (57645488855259).

100121112222021 is a wasteful number, since it uses less digits than its factorization.

100121112222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011324365896 (or 1011324365893 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 100121112222021 its reverse (120222211121001), we get a palindrome (220343323343022).

The spelling of 100121112222021 in words is "one hundred trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty-two thousand, twenty-one".