2102101621393 has 2 divisors, whose sum is σ = 2102101621394. Its totient is φ = 2102101621392.

The previous prime is 2102101621381. The next prime is 2102101621421. The reversal of 2102101621393 is 3931261012012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1748762918464 + 353338702929 = 1322408^2 + 594423^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102101621393 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102101621343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051050810696 + 1051050810697.

It is an arithmetic number, because the mean of its divisors is an integer number (1051050810697).

Almost surely, 2^{2102101621393} is an apocalyptic number.

It is an amenable number.

2102101621393 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102101621393 is an equidigital number, since it uses as much as digits as its factorization.

2102101621393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 2102101621393 in words is "two trillion, one hundred two billion, one hundred one million, six hundred twenty-one thousand, three hundred ninety-three".