321221213102101 has 4 divisors (see below), whose sum is σ = 345930537186892. Its totient is φ = 296511889017312.

The previous prime is 321221213102089. The next prime is 321221213102143. The reversal of 321221213102101 is 101201312122123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38531802345201 + 282689410756900 = 6207399^2 + 16813370^2 .

It is a cyclic number.

It is not a de Polignac number, because 321221213102101 - 2¹⁹ = 321221212577813 is a prime.

It is a super-2 number, since 2×321221213102101² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321221213102201) 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, 12354662042376 + ... + 12354662042401.

It is an arithmetic number, because the mean of its divisors is an integer number (86482634296723).

Almost surely, 2^{321221213102101} is an apocalyptic number.

It is an amenable number.

321221213102101 is a deficient number, since it is larger than the sum of its proper divisors (24709324084791).

321221213102101 is a wasteful number, since it uses less digits than its factorization.

321221213102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24709324084790.

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

Adding to 321221213102101 its reverse (101201312122123), we get a palindrome (422422525224224).

The spelling of 321221213102101 in words is "three hundred twenty-one trillion, two hundred twenty-one billion, two hundred thirteen million, one hundred two thousand, one hundred one".