212011020321 has 16 divisors (see below), whose sum is σ = 284742494400. Its totient is φ = 140310309888.

The previous prime is 212011020311. The next prime is 212011020337. The reversal of 212011020321 is 123020110212.

It is not a de Polignac number, because 212011020321 - 2¹⁸ = 212010758177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212011020321.

It is not an unprimeable number, because it can be changed into a prime (212011020311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6194985 + ... + 6229113.

It is an arithmetic number, because the mean of its divisors is an integer number (17796405900).

Almost surely, 2^212011020321 is an apocalyptic number.

It is an amenable number.

212011020321 is a deficient number, since it is larger than the sum of its proper divisors (72731474079).

212011020321 is a wasteful number, since it uses less digits than its factorization.

212011020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49168.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212011020321 its reverse (123020110212), we get a palindrome (335031130533).

The spelling of 212011020321 in words is "two hundred twelve billion, eleven million, twenty thousand, three hundred twenty-one".