212102201021 has 8 divisors (see below), whose sum is σ = 222079415040. Its totient is φ = 202187935312.

The previous prime is 212102200997. The next prime is 212102201033. The reversal of 212102201021 is 120102201212.

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

It is a cyclic number.

It is not a de Polignac number, because 212102201021 - 2⁶ = 212102200957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212102200987 and 212102201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102201081) 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, 15730181 + ... + 15743658.

It is an arithmetic number, because the mean of its divisors is an integer number (27759926880).

Almost surely, 2^212102201021 is an apocalyptic number.

It is an amenable number.

212102201021 is a deficient number, since it is larger than the sum of its proper divisors (9977214019).

212102201021 is a wasteful number, since it uses less digits than its factorization.

212102201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31474155.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212102201021 its reverse (120102201212), we get a palindrome (332204402233).

The spelling of 212102201021 in words is "two hundred twelve billion, one hundred two million, two hundred one thousand, twenty-one".