212101103021 has 4 divisors (see below), whose sum is σ = 214201114044. Its totient is φ = 210001092000.

The previous prime is 212101102987. The next prime is 212101103033. The reversal of 212101103021 is 120301101212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 150206629225 + 61894473796 = 387565^2 + 248786^2 .

It is a cyclic number.

It is not a de Polignac number, because 212101103021 - 2²² = 212096908717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212101102987 and 212101103005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101103051) 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, 1050005360 + ... + 1050005561.

It is an arithmetic number, because the mean of its divisors is an integer number (53550278511).

Almost surely, 2^212101103021 is an apocalyptic number.

It is an amenable number.

212101103021 is a deficient number, since it is larger than the sum of its proper divisors (2100011023).

212101103021 is a wasteful number, since it uses less digits than its factorization.

212101103021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100011022.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 212101103021 its reverse (120301101212), we get a palindrome (332402204233).

The spelling of 212101103021 in words is "two hundred twelve billion, one hundred one million, one hundred three thousand, twenty-one".