2168621123 has 2 divisors, whose sum is σ = 2168621124. Its totient is φ = 2168621122.

The previous prime is 2168621083. The next prime is 2168621137. The reversal of 2168621123 is 3211268612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2168621123 - 2²⁴ = 2151843907 is a prime.

It is a super-2 number, since 2×2168621123² = 9405835150243562258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2168621123.

It is not a weakly prime, because it can be changed into another prime (2168623123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084310561 + 1084310562.

It is an arithmetic number, because the mean of its divisors is an integer number (1084310562).

Almost surely, 2^2168621123 is an apocalyptic number.

2168621123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2168621123 is an equidigital number, since it uses as much as digits as its factorization.

2168621123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 2168621123 is about 46568.4563089652. The cubic root of 2168621123 is about 1294.3783131257.

Adding to 2168621123 its reverse (3211268612), we get a palindrome (5379889735).

The spelling of 2168621123 in words is "two billion, one hundred sixty-eight million, six hundred twenty-one thousand, one hundred twenty-three".