122261307520 has 64 divisors (see below), whose sum is σ = 318851951040. Its totient is φ = 44458654720.

The previous prime is 122261307451. The next prime is 122261307527. The reversal of 122261307520 is 25703162221.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (122261307527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8676292 + ... + 8690371.

It is an arithmetic number, because the mean of its divisors is an integer number (4982061735).

Almost surely, 2^122261307520 is an apocalyptic number.

122261307520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122261307520 is an abundant number, since it is smaller than the sum of its proper divisors (196590643520).

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

122261307520 is a wasteful number, since it uses less digits than its factorization.

122261307520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17366693 (or 17366681 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 122261307520 its reverse (25703162221), we get a palindrome (147964469741).

The spelling of 122261307520 in words is "one hundred twenty-two billion, two hundred sixty-one million, three hundred seven thousand, five hundred twenty".