2111728950391 has 8 divisors (see below), whose sum is σ = 2235968082144. Its totient is φ = 1987492016640.

The previous prime is 2111728950379. The next prime is 2111728950407. The reversal of 2111728950391 is 1930598271112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111728950391 - 2¹³ = 2111728942199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111728950311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689126 + ... + 2660188.

It is an arithmetic number, because the mean of its divisors is an integer number (279496010268).

Almost surely, 2^{2111728950391} is an apocalyptic number.

2111728950391 is a deficient number, since it is larger than the sum of its proper divisors (124239131753).

2111728950391 is a wasteful number, since it uses less digits than its factorization.

2111728950391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099001.

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 2111728950391 in words is "two trillion, one hundred eleven billion, seven hundred twenty-eight million, nine hundred fifty thousand, three hundred ninety-one".