123402400101320 has 16 divisors (see below), whose sum is σ = 277655400228060. Its totient is φ = 49360960040512.

The previous prime is 123402400101317. The next prime is 123402400101341. The reversal of 123402400101320 is 23101004204321.

It can be written as a sum of positive squares in 2 ways, for example, as 116068345344004 + 7334054757316 = 10773502^2 + 2708146^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1542530001227 + ... + 1542530001306.

Almost surely, 2^{123402400101320} is an apocalyptic number.

123402400101320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123402400101320 is an abundant number, since it is smaller than the sum of its proper divisors (154253000126740).

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

123402400101320 is a wasteful number, since it uses less digits than its factorization.

123402400101320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085060002544 (or 3085060002540 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 123402400101320 its reverse (23101004204321), we get a palindrome (146503404305641).

The spelling of 123402400101320 in words is "one hundred twenty-three trillion, four hundred two billion, four hundred million, one hundred one thousand, three hundred twenty".