201211021321321 has 16 divisors (see below), whose sum is σ = 221859940135680. Its totient is φ = 180956537326080.

The previous prime is 201211021321273. The next prime is 201211021321333. The reversal of 201211021321321 is 123123120112102.

It is a happy number.

It is not a de Polignac number, because 201211021321321 - 2²⁷ = 201210887103593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201211021321292 and 201211021321301.

It is not an unprimeable number, because it can be changed into a prime (201211021321381) 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, 37488561 + ... + 42518398.

It is an arithmetic number, because the mean of its divisors is an integer number (13866246258480).

Almost surely, 2^{201211021321321} is an apocalyptic number.

It is an amenable number.

201211021321321 is a deficient number, since it is larger than the sum of its proper divisors (20648918814359).

201211021321321 is a wasteful number, since it uses less digits than its factorization.

201211021321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80009424.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 201211021321321 its reverse (123123120112102), we get a palindrome (324334141433423).

The spelling of 201211021321321 in words is "two hundred one trillion, two hundred eleven billion, twenty-one million, three hundred twenty-one thousand, three hundred twenty-one".