21512003333222 has 8 divisors (see below), whose sum is σ = 32345016946200. Its totient is φ = 10730331017824.

The previous prime is 21512003333221. The next prime is 21512003333263. The reversal of 21512003333222 is 22233330021512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21512003333221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12835323347 + ... + 12835325022.

It is an arithmetic number, because the mean of its divisors is an integer number (4043127118275).

Almost surely, 2^{21512003333222} is an apocalyptic number.

21512003333222 is a deficient number, since it is larger than the sum of its proper divisors (10833013612978).

21512003333222 is a wasteful number, since it uses less digits than its factorization.

21512003333222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25670648790.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 21512003333222 its reverse (22233330021512), we get a palindrome (43745333354734).

The spelling of 21512003333222 in words is "twenty-one trillion, five hundred twelve billion, three million, three hundred thirty-three thousand, two hundred twenty-two".