321221232101 has 12 divisors (see below), whose sum is σ = 407635107840. Its totient is φ = 250302258360.

The previous prime is 321221232097. The next prime is 321221232107. The reversal of 321221232101 is 101232122123.

It is not a de Polignac number, because 321221232101 - 2² = 321221232097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321221232107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297978341 + ... + 297979418.

It is an arithmetic number, because the mean of its divisors is an integer number (33969592320).

Almost surely, 2^321221232101 is an apocalyptic number.

It is an amenable number.

321221232101 is a deficient number, since it is larger than the sum of its proper divisors (86413875739).

321221232101 is a wasteful number, since it uses less digits than its factorization.

321221232101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595957784 (or 595957777 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 321221232101 its reverse (101232122123), we get a palindrome (422453354224).

The spelling of 321221232101 in words is "three hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred one".