12101204520 has 384 divisors, whose sum is σ = 43314998400. Its totient is φ = 3004342272.

The previous prime is 12101204509. The next prime is 12101204551. The reversal of 12101204520 is 2540210121.

12101204520 is a `hidden beast` number, since 1 + 21 + 0 + 120 + 4 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12101204493 and 12101204502.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42760299 + ... + 42760581.

It is an arithmetic number, because the mean of its divisors is an integer number (112799475).

Almost surely, 2^12101204520 is an apocalyptic number.

12101204520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12101204520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21657499200).

12101204520 is an abundant number, since it is smaller than the sum of its proper divisors (31213793880).

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

12101204520 is a wasteful number, since it uses less digits than its factorization.

12101204520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 12101204520 its reverse (2540210121), we get a palindrome (14641414641).

The spelling of 12101204520 in words is "twelve billion, one hundred one million, two hundred four thousand, five hundred twenty".