10102121321 has 2 divisors, whose sum is σ = 10102121322. Its totient is φ = 10102121320.

The previous prime is 10102121273. The next prime is 10102121347. The reversal of 10102121321 is 12312120101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8585875600 + 1516245721 = 92660^2 + 38939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10102121321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10102121296 and 10102121305.

It is not a weakly prime, because it can be changed into another prime (10102121921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051060660 + 5051060661.

It is an arithmetic number, because the mean of its divisors is an integer number (5051060661).

Almost surely, 2^10102121321 is an apocalyptic number.

It is an amenable number.

10102121321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10102121321 is an equidigital number, since it uses as much as digits as its factorization.

10102121321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 10102121321 its reverse (12312120101), we get a palindrome (22414241422).

The spelling of 10102121321 in words is "ten billion, one hundred two million, one hundred twenty-one thousand, three hundred twenty-one".