2113123357 has 2 divisors, whose sum is σ = 2113123358. Its totient is φ = 2113123356.

The previous prime is 2113123319. The next prime is 2113123423. The reversal of 2113123357 is 7533213112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1188111961 + 925011396 = 34469^2 + 30414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113123357 is a prime.

It is a super-3 number, since 3×2113123357³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113123457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056561678 + 1056561679.

It is an arithmetic number, because the mean of its divisors is an integer number (1056561679).

Almost surely, 2^2113123357 is an apocalyptic number.

It is an amenable number.

2113123357 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113123357 is an equidigital number, since it uses as much as digits as its factorization.

2113123357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 2113123357 is about 45968.7215071292. The cubic root of 2113123357 is about 1283.2411668147.

Adding to 2113123357 its reverse (7533213112), we get a palindrome (9646336469).

The spelling of 2113123357 in words is "two billion, one hundred thirteen million, one hundred twenty-three thousand, three hundred fifty-seven".