2157101117 has 8 divisors (see below), whose sum is σ = 2357667072. Its totient is φ = 1964721600.

The previous prime is 2157101059. The next prime is 2157101123. The reversal of 2157101117 is 7111017512.

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 2157101117 - 2⁶ = 2157101053 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 (2157191117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2046059 + ... + 2047112.

It is an arithmetic number, because the mean of its divisors is an integer number (294708384).

Almost surely, 2^2157101117 is an apocalyptic number.

It is an amenable number.

2157101117 is a deficient number, since it is larger than the sum of its proper divisors (200565955).

2157101117 is a wasteful number, since it uses less digits than its factorization.

2157101117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093219.

The product of its (nonzero) digits is 490, while the sum is 26.

The square root of 2157101117 is about 46444.6026681250. The cubic root of 2157101117 is about 1292.0822723395.

Adding to 2157101117 its reverse (7111017512), we get a palindrome (9268118629).

The spelling of 2157101117 in words is "two billion, one hundred fifty-seven million, one hundred one thousand, one hundred seventeen".