123129992930 has 16 divisors (see below), whose sum is σ = 253295985600. Its totient is φ = 42215997552.

The previous prime is 123129992929. The next prime is 123129992933. The reversal of 123129992930 is 39299921321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (123129992933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879499880 + ... + 879500019.

It is an arithmetic number, because the mean of its divisors is an integer number (15830999100).

Almost surely, 2^123129992930 is an apocalyptic number.

123129992930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123129992930 is an abundant number, since it is smaller than the sum of its proper divisors (130165992670).

123129992930 is a wasteful number, since it uses less digits than its factorization.

123129992930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758999913.

The product of its (nonzero) digits is 472392, while the sum is 50.

The spelling of 123129992930 in words is "one hundred twenty-three billion, one hundred twenty-nine million, nine hundred ninety-two thousand, nine hundred thirty".