21221202219 has 8 divisors (see below), whose sum is σ = 32337070080. Its totient is φ = 12126401256.

The previous prime is 21221202203. The next prime is 21221202229. The reversal of 21221202219 is 91220212212.

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

It is not a de Polignac number, because 21221202219 - 2⁴ = 21221202203 is a prime.

It is a super-3 number, since 3×21221202219³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21221202229) 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, 505266699 + ... + 505266740.

It is an arithmetic number, because the mean of its divisors is an integer number (4042133760).

Almost surely, 2^21221202219 is an apocalyptic number.

21221202219 is a deficient number, since it is larger than the sum of its proper divisors (11115867861).

21221202219 is a wasteful number, since it uses less digits than its factorization.

21221202219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010533449.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 21221202219 in words is "twenty-one billion, two hundred twenty-one million, two hundred two thousand, two hundred nineteen".