321221102011 has 4 divisors (see below), whose sum is σ = 323673171624. Its totient is φ = 318769032400.

The previous prime is 321221101951. The next prime is 321221102017. The reversal of 321221102011 is 110201122123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110201122123 = 197 ⋅559396559.

It is a cyclic number.

It is not a de Polignac number, because 321221102011 - 2¹⁹ = 321220577723 is a prime.

It is a super-2 number, since 2×321221102011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321221102017) 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, 1226034610 + ... + 1226034871.

It is an arithmetic number, because the mean of its divisors is an integer number (80918292906).

Almost surely, 2^321221102011 is an apocalyptic number.

321221102011 is a deficient number, since it is larger than the sum of its proper divisors (2452069613).

321221102011 is a wasteful number, since it uses less digits than its factorization.

321221102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452069612.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 321221102011 its reverse (110201122123), we get a palindrome (431422224134).

The spelling of 321221102011 in words is "three hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, eleven".