123212052240 has 80 divisors (see below), whose sum is σ = 384244656768. Its totient is φ = 32659790848.

The previous prime is 123212052191. The next prime is 123212052241. The reversal of 123212052240 is 42250212321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 123212052240.

It is not an unprimeable number, because it can be changed into a prime (123212052241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1496997 + ... + 1577156.

Almost surely, 2^123212052240 is an apocalyptic number.

123212052240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123212052240 is an abundant number, since it is smaller than the sum of its proper divisors (261032604528).

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

123212052240 is a wasteful number, since it uses less digits than its factorization.

123212052240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3074336 (or 3074330 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 123212052240 its reverse (42250212321), we get a palindrome (165462264561).

The spelling of 123212052240 in words is "one hundred twenty-three billion, two hundred twelve million, fifty-two thousand, two hundred forty".