212101021021 has 8 divisors (see below), whose sum is σ = 216224225280. Its totient is φ = 207982309392.

The previous prime is 212101021001. The next prime is 212101021037. The reversal of 212101021021 is 120120101212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212101021021 is a prime.

It is a super-3 number, since 3×212101021021³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212101020992 and 212101021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212101021001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027741 + ... + 1216738.

It is an arithmetic number, because the mean of its divisors is an integer number (27028028160).

Almost surely, 2^212101021021 is an apocalyptic number.

It is an amenable number.

212101021021 is a deficient number, since it is larger than the sum of its proper divisors (4123204259).

212101021021 is a wasteful number, since it uses less digits than its factorization.

212101021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246315.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212101021021 its reverse (120120101212), we get a palindrome (332221122233).

The spelling of 212101021021 in words is "two hundred twelve billion, one hundred one million, twenty-one thousand, twenty-one".