123130211 has 4 divisors (see below), whose sum is σ = 124349424. Its totient is φ = 121911000.

The previous prime is 123130207. The next prime is 123130213. The reversal of 123130211 is 112031321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123130211 - 2² = 123130207 is a prime.

It is a super-2 number, since 2×123130211² = 30322097721809042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123130213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609455 + ... + 609656.

It is an arithmetic number, because the mean of its divisors is an integer number (31087356).

Almost surely, 2^123130211 is an apocalyptic number.

123130211 is a deficient number, since it is larger than the sum of its proper divisors (1219213).

123130211 is a wasteful number, since it uses less digits than its factorization.

123130211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219212.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 123130211 is about 11096.4053188409. The cubic root of 123130211 is about 497.4944130413.

Adding to 123130211 its reverse (112031321), we get a palindrome (235161532).

The spelling of 123130211 in words is "one hundred twenty-three million, one hundred thirty thousand, two hundred eleven".