122540256220 has 48 divisors (see below), whose sum is σ = 258394086720. Its totient is φ = 48814700544.

The previous prime is 122540256197. The next prime is 122540256227. The reversal of 122540256220 is 22652045221.

It is a super-2 number, since 2×122540256220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122540256227) 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, 4877932 + ... + 4902988.

It is an arithmetic number, because the mean of its divisors is an integer number (5383210140).

Almost surely, 2^122540256220 is an apocalyptic number.

122540256220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122540256220 is an abundant number, since it is smaller than the sum of its proper divisors (135853830500).

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

122540256220 is a wasteful number, since it uses less digits than its factorization.

122540256220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26062 (or 26060 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 122540256220 in words is "one hundred twenty-two billion, five hundred forty million, two hundred fifty-six thousand, two hundred twenty".