15210021200 has 120 divisors (see below), whose sum is σ = 40072869696. Its totient is φ = 5501952000.

The previous prime is 15210021199. The next prime is 15210021209. The reversal of 15210021200 is 212001251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15210021209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 840245 + ... + 858155.

Almost surely, 2^15210021200 is an apocalyptic number.

15210021200 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 15210021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20036434848).

15210021200 is an abundant number, since it is smaller than the sum of its proper divisors (24862848496).

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

15210021200 is a wasteful number, since it uses less digits than its factorization.

15210021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18133 (or 18122 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 15210021200 its reverse (212001251), we get a palindrome (15422022451).

The spelling of 15210021200 in words is "fifteen billion, two hundred ten million, twenty-one thousand, two hundred".