100212012222021 has 32 divisors (see below), whose sum is σ = 169672352544000. Its totient is φ = 57263594984640.

The previous prime is 100212012221999. The next prime is 100212012222029. The reversal of 100212012222021 is 120222210212001.

It is a happy number.

It is not a de Polignac number, because 100212012222021 - 2¹⁰ = 100212012220997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100212012221985 and 100212012222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212012222029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25467955 + ... + 29138303.

It is an arithmetic number, because the mean of its divisors is an integer number (5302261017000).

Almost surely, 2^{100212012222021} is an apocalyptic number.

It is an amenable number.

100212012222021 is a deficient number, since it is larger than the sum of its proper divisors (69460340321979).

100212012222021 is a wasteful number, since it uses less digits than its factorization.

100212012222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814826 (or 3814820 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 100212012222021 its reverse (120222210212001), we get a palindrome (220434222434022).

The spelling of 100212012222021 in words is "one hundred trillion, two hundred twelve billion, twelve million, two hundred twenty-two thousand, twenty-one".