123297821290 has 64 divisors (see below), whose sum is σ = 262535385600. Its totient is φ = 40792824576.

The previous prime is 123297821281. The next prime is 123297821303. The reversal of 123297821290 is 92128792321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 123297821290.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3794131 + ... + 3826489.

It is an arithmetic number, because the mean of its divisors is an integer number (4102115400).

Almost surely, 2^123297821290 is an apocalyptic number.

123297821290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123297821290 is an abundant number, since it is smaller than the sum of its proper divisors (139237564310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123297821290 is a wasteful number, since it uses less digits than its factorization.

123297821290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34279.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 123297821290 in words is "one hundred twenty-three billion, two hundred ninety-seven million, eight hundred twenty-one thousand, two hundred ninety".