211320220321 has 32 divisors (see below), whose sum is σ = 263154528000. Its totient is φ = 165575031552.

The previous prime is 211320220303. The next prime is 211320220367. The reversal of 211320220321 is 123022023112.

It is not a de Polignac number, because 211320220321 - 2²¹ = 211318123169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (211320220921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6297175 + ... + 6330643.

It is an arithmetic number, because the mean of its divisors is an integer number (8223579000).

Almost surely, 2^211320220321 is an apocalyptic number.

It is an amenable number.

211320220321 is a deficient number, since it is larger than the sum of its proper divisors (51834307679).

211320220321 is a wasteful number, since it uses less digits than its factorization.

211320220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35161.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 211320220321 its reverse (123022023112), we get a palindrome (334342243433).

The spelling of 211320220321 in words is "two hundred eleven billion, three hundred twenty million, two hundred twenty thousand, three hundred twenty-one".