12121222333040 has 80 divisors (see below), whose sum is σ = 29998412791200. Its totient is φ = 4541695082496.

The previous prime is 12121222333037. The next prime is 12121222333043. The reversal of 12121222333040 is 4033322212121.

It is an interprime number because it is at equal distance from previous prime (12121222333037) and next prime (12121222333043).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121222333043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44665217 + ... + 44935776.

It is an arithmetic number, because the mean of its divisors is an integer number (374980159890).

Almost surely, 2^{12121222333040} is an apocalyptic number.

12121222333040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121222333040 is an abundant number, since it is smaller than the sum of its proper divisors (17877190458160).

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

12121222333040 is a wasteful number, since it uses less digits than its factorization.

12121222333040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89601114 (or 89601108 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 12121222333040 its reverse (4033322212121), we get a palindrome (16154544545161).

The spelling of 12121222333040 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, three hundred thirty-three thousand, forty".