123361501220 has 48 divisors (see below), whose sum is σ = 260248863168. Its totient is φ = 49118509440.

The previous prime is 123361501189. The next prime is 123361501231. The reversal of 123361501220 is 22105163321.

It is a happy number.

It is a super-2 number, since 2×123361501220² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123361501220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3882719 + ... + 3914361.

It is an arithmetic number, because the mean of its divisors is an integer number (5421851316).

Almost surely, 2^123361501220 is an apocalyptic number.

123361501220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123361501220 is an abundant number, since it is smaller than the sum of its proper divisors (136887361948).

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

123361501220 is a wasteful number, since it uses less digits than its factorization.

123361501220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32540 (or 32538 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 123361501220 its reverse (22105163321), we get a palindrome (145466664541).

The spelling of 123361501220 in words is "one hundred twenty-three billion, three hundred sixty-one million, five hundred one thousand, two hundred twenty".