10101121321 has 4 divisors (see below), whose sum is σ = 10195524432. Its totient is φ = 10006718212.

The previous prime is 10101121291. The next prime is 10101121339. The reversal of 10101121321 is 12312110101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10101121321 - 2⁷ = 10101121193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10101121351) 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, 47201395 + ... + 47201608.

It is an arithmetic number, because the mean of its divisors is an integer number (2548881108).

Almost surely, 2^10101121321 is an apocalyptic number.

It is an amenable number.

10101121321 is a deficient number, since it is larger than the sum of its proper divisors (94403111).

10101121321 is an equidigital number, since it uses as much as digits as its factorization.

10101121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94403110.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 10101121321 its reverse (12312110101), we get a palindrome (22413231422).

The spelling of 10101121321 in words is "ten billion, one hundred one million, one hundred twenty-one thousand, three hundred twenty-one".