1010120021321 has 2 divisors, whose sum is σ = 1010120021322. Its totient is φ = 1010120021320.

The previous prime is 1010120021297. The next prime is 1010120021353. The reversal of 1010120021321 is 1231200210101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 963271583296 + 46848438025 = 981464^2 + 216445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010120021321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1010120021296 and 1010120021305.

It is not a weakly prime, because it can be changed into another prime (1010120021371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505060010660 + 505060010661.

It is an arithmetic number, because the mean of its divisors is an integer number (505060010661).

Almost surely, 2^{1010120021321} is an apocalyptic number.

It is an amenable number.

1010120021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010120021321 is an equidigital number, since it uses as much as digits as its factorization.

1010120021321 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 1010120021321 its reverse (1231200210101), we get a palindrome (2241320231422).

The spelling of 1010120021321 in words is "one trillion, ten billion, one hundred twenty million, twenty-one thousand, three hundred twenty-one".