123212022240 has 96 divisors (see below), whose sum is σ = 394696229760. Its totient is φ = 32299641344.

The previous prime is 123212022239. The next prime is 123212022247. The reversal of 123212022240 is 42220212321.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212022247) 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, 2147034 + ... + 2203673.

It is an arithmetic number, because the mean of its divisors is an integer number (4111419060).

Almost surely, 2^123212022240 is an apocalyptic number.

123212022240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123212022240 is an abundant number, since it is smaller than the sum of its proper divisors (271484207520).

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

123212022240 is a wasteful number, since it uses less digits than its factorization.

123212022240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4350784 (or 4350776 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 123212022240 its reverse (42220212321), we get a palindrome (165432234561).

The spelling of 123212022240 in words is "one hundred twenty-three billion, two hundred twelve million, twenty-two thousand, two hundred forty".