123130221211 has 4 divisors (see below), whose sum is σ = 123133163112. Its totient is φ = 123127279312.

The previous prime is 123130221197. The next prime is 123130221283. The reversal of 123130221211 is 112122031321.

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 123130221211 - 2⁹ = 123130220699 is a prime.

It is a super-2 number, since 2×123130221211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123130221311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407250 + ... + 1492183.

It is an arithmetic number, because the mean of its divisors is an integer number (30783290778).

Almost surely, 2^123130221211 is an apocalyptic number.

123130221211 is a deficient number, since it is larger than the sum of its proper divisors (2941901).

123130221211 is an equidigital number, since it uses as much as digits as its factorization.

123130221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941900.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123130221211 its reverse (112122031321), we get a palindrome (235252252532).

The spelling of 123130221211 in words is "one hundred twenty-three billion, one hundred thirty million, two hundred twenty-one thousand, two hundred eleven".