100212002021 has 4 divisors (see below), whose sum is σ = 100339336992. Its totient is φ = 100084667052.

The previous prime is 100212001997. The next prime is 100212002047. The reversal of 100212002021 is 120200212001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120200212001 = 443 ⋅271332307.

It is a cyclic number.

It is not a de Polignac number, because 100212002021 - 2³⁴ = 83032132837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100212001993 and 100212002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212022021) 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, 63666305 + ... + 63667878.

It is an arithmetic number, because the mean of its divisors is an integer number (25084834248).

Almost surely, 2^100212002021 is an apocalyptic number.

It is an amenable number.

100212002021 is a deficient number, since it is larger than the sum of its proper divisors (127334971).

100212002021 is an equidigital number, since it uses as much as digits as its factorization.

100212002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127334970.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100212002021 its reverse (120200212001), we get a palindrome (220412214022).

The spelling of 100212002021 in words is "one hundred billion, two hundred twelve million, two thousand, twenty-one".