21212202219999 has 8 divisors (see below), whose sum is σ = 32323355763840. Its totient is φ = 12121258411416.

The previous prime is 21212202219977. The next prime is 21212202220003. The reversal of 21212202219999 is 99991220221212.

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

It is not a de Polignac number, because 21212202219999 - 2⁸ = 21212202219743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212202209999) 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, 505052433789 + ... + 505052433830.

It is an arithmetic number, because the mean of its divisors is an integer number (4040419470480).

Almost surely, 2^{21212202219999} is an apocalyptic number.

21212202219999 is a deficient number, since it is larger than the sum of its proper divisors (11111153543841).

21212202219999 is a wasteful number, since it uses less digits than its factorization.

21212202219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010104867629.

The product of its (nonzero) digits is 419904, while the sum is 51.

The spelling of 21212202219999 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, two hundred nineteen thousand, nine hundred ninety-nine".