2100938470391 has 2 divisors, whose sum is σ = 2100938470392. Its totient is φ = 2100938470390.

The previous prime is 2100938470369. The next prime is 2100938470417. The reversal of 2100938470391 is 1930748390012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100938470391 - 2³⁰ = 2099864728567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100938470361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050469235195 + 1050469235196.

It is an arithmetic number, because the mean of its divisors is an integer number (1050469235196).

Almost surely, 2^{2100938470391} is an apocalyptic number.

2100938470391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100938470391 is an equidigital number, since it uses as much as digits as its factorization.

2100938470391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 2100938470391 in words is "two trillion, one hundred billion, nine hundred thirty-eight million, four hundred seventy thousand, three hundred ninety-one".