20110102012321 has 2 divisors, whose sum is σ = 20110102012322. Its totient is φ = 20110102012320.

The previous prime is 20110102012307. The next prime is 20110102012327. The reversal of 20110102012321 is 12321020101102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19223182580625 + 886919431696 = 4384425^2 + 941764^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110102012321 - 2²³ = 20110093623713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110102012295 and 20110102012304.

It is not a weakly prime, because it can be changed into another prime (20110102012327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055051006160 + 10055051006161.

It is an arithmetic number, because the mean of its divisors is an integer number (10055051006161).

Almost surely, 2^{20110102012321} is an apocalyptic number.

It is an amenable number.

20110102012321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110102012321 is an equidigital number, since it uses as much as digits as its factorization.

20110102012321 is an evil number, because the sum of its binary digits is even.

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

Adding to 20110102012321 its reverse (12321020101102), we get a palindrome (32431122113423).

The spelling of 20110102012321 in words is "twenty trillion, one hundred ten billion, one hundred two million, twelve thousand, three hundred twenty-one".