12201615221 has 8 divisors (see below), whose sum is σ = 12602709504. Its totient is φ = 11800989360.

The previous prime is 12201615203. The next prime is 12201615233. The reversal of 12201615221 is 12251610221.

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

It is a cyclic number.

It is not a de Polignac number, because 12201615221 - 2¹⁰ = 12201614197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201615271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63761 + ... + 168726.

It is an arithmetic number, because the mean of its divisors is an integer number (1575338688).

Almost surely, 2^12201615221 is an apocalyptic number.

It is an amenable number.

12201615221 is a deficient number, since it is larger than the sum of its proper divisors (401094283).

12201615221 is a wasteful number, since it uses less digits than its factorization.

12201615221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234211.

The product of its (nonzero) digits is 480, while the sum is 23.

Subtracting 12201615221 from its reverse (12251610221), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 12201615221 in words is "twelve billion, two hundred one million, six hundred fifteen thousand, two hundred twenty-one".