1000101121321 has 4 divisors (see below), whose sum is σ = 1002089394432. Its totient is φ = 998112848212.

The previous prime is 1000101121309. The next prime is 1000101121343. The reversal of 1000101121321 is 1231211010001.

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 1000101121321 - 2¹⁹ = 1000100597033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000101121021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994135801 + ... + 994136806.

It is an arithmetic number, because the mean of its divisors is an integer number (250522348608).

Almost surely, 2^{1000101121321} is an apocalyptic number.

It is an amenable number.

1000101121321 is a deficient number, since it is larger than the sum of its proper divisors (1988273111).

1000101121321 is an equidigital number, since it uses as much as digits as its factorization.

1000101121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988273110.

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

Adding to 1000101121321 its reverse (1231211010001), we get a palindrome (2231312131322).

The spelling of 1000101121321 in words is "one trillion, one hundred one million, one hundred twenty-one thousand, three hundred twenty-one".