1000010120321 has 2 divisors, whose sum is σ = 1000010120322. Its totient is φ = 1000010120320.

The previous prime is 1000010120279. The next prime is 1000010120323. The reversal of 1000010120321 is 1230210100001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 707449210000 + 292560910321 = 841100^2 + 540889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000010120321 is a prime.

Together with 1000010120323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1000010120323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500005060160 + 500005060161.

It is an arithmetic number, because the mean of its divisors is an integer number (500005060161).

Almost surely, 2^{1000010120321} is an apocalyptic number.

It is an amenable number.

1000010120321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000010120321 is an equidigital number, since it uses as much as digits as its factorization.

1000010120321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1000010120321 its reverse (1230210100001), we get a palindrome (2230220220322).

The spelling of 1000010120321 in words is "one trillion, ten million, one hundred twenty thousand, three hundred twenty-one".