12201651520 has 112 divisors (see below), whose sum is σ = 29675114640. Its totient is φ = 4776984576.

The previous prime is 12201651493. The next prime is 12201651551. The reversal of 12201651520 is 2515610221.

It can be written as a sum of positive squares in 8 ways, for example, as 45265984 + 12156385536 = 6728^2 + 110256^2 .

It is a congruent number.

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, 11413546 + ... + 11414614.

Almost surely, 2^12201651520 is an apocalyptic number.

12201651520 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 12201651520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14837557320).

12201651520 is an abundant number, since it is smaller than the sum of its proper divisors (17473463120).

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

12201651520 is a wasteful number, since it uses less digits than its factorization.

12201651520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812 (or 1802 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 12201651520 in words is "twelve billion, two hundred one million, six hundred fifty-one thousand, five hundred twenty".