212001202321 has 4 divisors (see below), whose sum is σ = 212002880292. Its totient is φ = 211999524352.

The previous prime is 212001202319. The next prime is 212001202327. The reversal of 212001202321 is 123202100212.

It is a happy number.

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 207877636096 + 4123566225 = 455936^2 + 64215^2 .

It is a cyclic number.

It is not a de Polignac number, because 212001202321 - 2¹ = 212001202319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001202295 and 212001202304.

It is not an unprimeable number, because it can be changed into a prime (212001202327) 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, 632536 + ... + 907801.

It is an arithmetic number, because the mean of its divisors is an integer number (53000720073).

Almost surely, 2^212001202321 is an apocalyptic number.

It is an amenable number.

212001202321 is a deficient number, since it is larger than the sum of its proper divisors (1677971).

212001202321 is a wasteful number, since it uses less digits than its factorization.

212001202321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677970.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212001202321 its reverse (123202100212), we get a palindrome (335203302533).

The spelling of 212001202321 in words is "two hundred twelve billion, one million, two hundred two thousand, three hundred twenty-one".