100212110120021 has 4 divisors (see below), whose sum is σ = 100485167641152. Its totient is φ = 99939052598892.

The previous prime is 100212110119937. The next prime is 100212110120033. The reversal of 100212110120021 is 120021011212001.

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.

It is a cyclic number.

It is not a de Polignac number, because 100212110120021 - 2¹⁰ = 100212110118997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100212110119978 and 100212110120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212110122021) 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, 136528760015 + ... + 136528760748.

It is an arithmetic number, because the mean of its divisors is an integer number (25121291910288).

Almost surely, 2^{100212110120021} is an apocalyptic number.

It is an amenable number.

100212110120021 is a deficient number, since it is larger than the sum of its proper divisors (273057521131).

100212110120021 is an equidigital number, since it uses as much as digits as its factorization.

100212110120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273057521130.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100212110120021 its reverse (120021011212001), we get a palindrome (220233121332022).

The spelling of 100212110120021 in words is "one hundred trillion, two hundred twelve billion, one hundred ten million, one hundred twenty thousand, twenty-one".